2157227512 has 64 divisors (see below), whose sum is σ = 4682901600. Its totient is φ = 920739840.

The previous prime is 2157227507. The next prime is 2157227521.

2157227512 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 760048 + ... + 762880.

Almost surely, 2^2157227512 is an apocalyptic number.

2157227512 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2157227512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2341450800).

2157227512 is an abundant number, since it is smaller than the sum of its proper divisors (2525674088).

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

2157227512 is a wasteful number, since it uses less digits than its factorization.

2157227512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3376 (or 3372 counting only the distinct ones).

The product of its digits is 19600, while the sum is 34.

The square root of 2157227512 is about 46445.9633552799. The cubic root of 2157227512 is about 1292.1075082990.

The spelling of 2157227512 in words is "two billion, one hundred fifty-seven million, two hundred twenty-seven thousand, five hundred twelve".