31312140210 has 48 divisors (see below), whose sum is σ = 87673995864. Its totient is φ = 7707603456.

The previous prime is 31312140199. The next prime is 31312140229. The reversal of 31312140210 is 1204121313.

31312140210 is a `hidden beast` number, since 3 + 1 + 312 + 140 + 210 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 28374391809 + 2937748401 = 168447^2 + 54201^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13380087 + ... + 13382426.

Almost surely, 2^31312140210 is an apocalyptic number.

31312140210 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

31312140210 is an abundant number, since it is smaller than the sum of its proper divisors (56361855654).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31312140210 is a wasteful number, since it uses less digits than its factorization.

31312140210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26762539 (or 26762536 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 31312140210 its reverse (1204121313), we get a palindrome (32516261523).

The spelling of 31312140210 in words is "thirty-one billion, three hundred twelve million, one hundred forty thousand, two hundred ten".