102155415 has 16 divisors (see below), whose sum is σ = 163749600. Its totient is φ = 54382592.

The previous prime is 102155399. The next prime is 102155423. The reversal of 102155415 is 514551201.

It is a cyclic number.

It is not a de Polignac number, because 102155415 - 2⁴ = 102155399 is a prime.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 2551 + ... + 14519.

It is an arithmetic number, because the mean of its divisors is an integer number (10234350).

Almost surely, 2^102155415 is an apocalyptic number.

102155415 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

102155415 is a deficient number, since it is larger than the sum of its proper divisors (61594185).

102155415 is a wasteful number, since it uses less digits than its factorization.

102155415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12546.

The product of its (nonzero) digits is 1000, while the sum is 24.

The square root of 102155415 is about 10107.1961987487. The cubic root of 102155415 is about 467.4700563242.

The spelling of 102155415 in words is "one hundred two million, one hundred fifty-five thousand, four hundred fifteen".