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2123212312 = 231367304709
BaseRepresentation
bin111111010001101…
…1010011000011000
312110222012100202001
41332203122120120
513322020243222
6550403450344
7103421002234
oct17643323030
95428170661
102123212312
1199a552921
124b30869b4
1327ab57460
14161dad5c4
15c65eee27
hex7e8da618

2123212312 has 32 divisors (see below), whose sum is σ = 4351258800. Its totient is φ = 965314944.

The previous prime is 2123212309. The next prime is 2123212313. The reversal of 2123212312 is 2132123212.

It is a self number, because there is not a number n which added to its sum of digits gives 2123212312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2123212313) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 145387 + ... + 159322.

Almost surely, 22123212312 is an apocalyptic number.

It is an amenable number.

2123212312 is an abundant number, since it is smaller than the sum of its proper divisors (2228046488).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2123212312 is a wasteful number, since it uses less digits than its factorization.

2123212312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304795 (or 304791 counting only the distinct ones).

The product of its digits is 288, while the sum is 19.

The square root of 2123212312 is about 46078.3280078607. The cubic root of 2123212312 is about 1285.2801726745.

Adding to 2123212312 its reverse (2132123212), we get a palindrome (4255335524).

The spelling of 2123212312 in words is "two billion, one hundred twenty-three million, two hundred twelve thousand, three hundred twelve".

Divisors: 1 2 4 8 13 26 52 67 104 134 268 536 871 1742 3484 6968 304709 609418 1218836 2437672 3961217 7922434 15844868 20415503 31689736 40831006 81662012 163324024 265401539 530803078 1061606156 2123212312