70102131 has 16 divisors (see below), whose sum is σ = 102126720. Its totient is φ = 42419520.

The previous prime is 70102127. The next prime is 70102133. The reversal of 70102131 is 13120107.

It is not a de Polignac number, because 70102131 - 2² = 70102127 is a prime.

It is a super-2 number, since 2×70102131² = 9828617541482322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 70102131.

It is not an unprimeable number, because it can be changed into a prime (70102133) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27111 + ... + 29583.

It is an arithmetic number, because the mean of its divisors is an integer number (6382920).

Almost surely, 2^70102131 is an apocalyptic number.

70102131 is a deficient number, since it is larger than the sum of its proper divisors (32024589).

70102131 is a wasteful number, since it uses less digits than its factorization.

70102131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3346.

The product of its (nonzero) digits is 42, while the sum is 15.

The square root of 70102131 is about 8372.7015353469. The cubic root of 70102131 is about 412.3288663855.

Adding to 70102131 its reverse (13120107), we get a palindrome (83222238).

It can be divided in two parts, 70 and 102131, that added together give a palindrome (102201).

The spelling of 70102131 in words is "seventy million, one hundred two thousand, one hundred thirty-one".