102655138 has 16 divisors (see below), whose sum is σ = 162328320. Its totient is φ = 48553776.

The previous prime is 102655127. The next prime is 102655159. The reversal of 102655138 is 831556201.

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, 30831 + ... + 33997.

It is an arithmetic number, because the mean of its divisors is an integer number (10145520).

Almost surely, 2^102655138 is an apocalyptic number.

102655138 is a deficient number, since it is larger than the sum of its proper divisors (59673182).

102655138 is a wasteful number, since it uses less digits than its factorization.

102655138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4041.

The product of its (nonzero) digits is 7200, while the sum is 31.

The square root of 102655138 is about 10131.8871884758. The cubic root of 102655138 is about 468.2310721230.

The spelling of 102655138 in words is "one hundred two million, six hundred fifty-five thousand, one hundred thirty-eight".