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221350145 = 5151293179
BaseRepresentation
bin11010011000110…
…00100100000001
3120102111202022112
431030120210001
5423131201040
633544145105
75325305462
oct1514304401
9512452275
10221350145
11103a45705
1262168195
1336b21123
142157cd69
1514675365
hexd318901

221350145 has 8 divisors (see below), whose sum is σ = 267380160. Its totient is φ = 175906800.

The previous prime is 221350139. The next prime is 221350153. The reversal of 221350145 is 541053122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2k-221350145 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 221350145.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 145835 + ... + 147344.

It is an arithmetic number, because the mean of its divisors is an integer number (33422520).

Almost surely, 2221350145 is an apocalyptic number.

It is an amenable number.

221350145 is a deficient number, since it is larger than the sum of its proper divisors (46030015).

221350145 is a wasteful number, since it uses less digits than its factorization.

221350145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293335.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 221350145 is about 14877.8407371500. The cubic root of 221350145 is about 604.9134908066.

The spelling of 221350145 in words is "two hundred twenty-one million, three hundred fifty thousand, one hundred forty-five".

Divisors: 1 5 151 755 293179 1465895 44270029 221350145