102515855 has 16 divisors (see below), whose sum is σ = 132753600. Its totient is φ = 75548928.

The previous prime is 102515843. The next prime is 102515869. The reversal of 102515855 is 558515201.

It is not a de Polignac number, because 102515855 - 2⁴ = 102515839 is a prime.

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, 37619 + ... + 40251.

It is an arithmetic number, because the mean of its divisors is an integer number (8297100).

Almost surely, 2^102515855 is an apocalyptic number.

102515855 is a deficient number, since it is larger than the sum of its proper divisors (30237745).

102515855 is a wasteful number, since it uses less digits than its factorization.

102515855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3250.

The product of its (nonzero) digits is 10000, while the sum is 32.

The square root of 102515855 is about 10125.0113580183. The cubic root of 102515855 is about 468.0192101959.

The spelling of 102515855 in words is "one hundred two million, five hundred fifteen thousand, eight hundred fifty-five".