102155512 has 32 divisors (see below), whose sum is σ = 200724480. Its totient is φ = 48648160.

The previous prime is 102155507. The next prime is 102155513. The reversal of 102155512 is 215551201.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102155513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47337 + ... + 49447.

It is an arithmetic number, because the mean of its divisors is an integer number (6272640).

Almost surely, 2^102155512 is an apocalyptic number.

It is an amenable number.

102155512 is a deficient number, since it is larger than the sum of its proper divisors (98568968).

102155512 is a wasteful number, since it uses less digits than its factorization.

102155512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2403 (or 2399 counting only the distinct ones).

The product of its (nonzero) digits is 500, while the sum is 22.

The square root of 102155512 is about 10107.2009973088. The cubic root of 102155512 is about 467.4702042837.

The spelling of 102155512 in words is "one hundred two million, one hundred fifty-five thousand, five hundred twelve".