102155655 has 32 divisors (see below), whose sum is σ = 187776000. Its totient is φ = 46455552.

The previous prime is 102155639. The next prime is 102155657. The reversal of 102155655 is 556551201.

It is not a de Polignac number, because 102155655 - 2⁴ = 102155639 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102155657) 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 31 ways as a sum of consecutive naturals, for example, 18451 + ... + 23339.

It is an arithmetic number, because the mean of its divisors is an integer number (5868000).

Almost surely, 2^102155655 is an apocalyptic number.

102155655 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

102155655 is a deficient number, since it is larger than the sum of its proper divisors (85620345).

102155655 is a wasteful number, since it uses less digits than its factorization.

102155655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5103.

The product of its (nonzero) digits is 7500, while the sum is 30.

The square root of 102155655 is about 10107.2080714706. The cubic root of 102155655 is about 467.4704224093.

The spelling of 102155655 in words is "one hundred two million, one hundred fifty-five thousand, six hundred fifty-five".