102051531 has 6 divisors (see below), whose sum is σ = 147407780. Its totient is φ = 68034348.

The previous prime is 102051517. The next prime is 102051539. The reversal of 102051531 is 135150201.

It is not a de Polignac number, because 102051531 - 2⁷ = 102051403 is a prime.

It is a super-2 number, since 2×102051531² = 20829029958887922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102051539) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5669521 + ... + 5669538.

Almost surely, 2^102051531 is an apocalyptic number.

102051531 is a deficient number, since it is larger than the sum of its proper divisors (45356249).

102051531 is a wasteful number, since it uses less digits than its factorization.

102051531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11339065 (or 11339062 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 18.

The square root of 102051531 is about 10102.0557808795. The cubic root of 102051531 is about 467.3115425208.

The spelling of 102051531 in words is "one hundred two million, fifty-one thousand, five hundred thirty-one".