31131200130030 has 384 divisors, whose sum is σ = 114395995284480. Its totient is φ = 5656944199680.

The previous prime is 31131200130013. The next prime is 31131200130047. The reversal of 31131200130030 is 3003100213113.

It is a happy number.

31131200130030 is a `hidden beast` number, since 3 + 1 + 131 + 200 + 1 + 300 + 30 = 666.

It is an interprime number because it is at equal distance from previous prime (31131200130013) and next prime (31131200130047).

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

It is a junction number, because it is equal to n+sod(n) for n = 31131200129985 and 31131200130012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 7381887 + ... + 10805306.

It is an arithmetic number, because the mean of its divisors is an integer number (297906237720).

Almost surely, 2^{31131200130030} is an apocalyptic number.

31131200130030 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

31131200130030 is an abundant number, since it is smaller than the sum of its proper divisors (83264795154450).

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

31131200130030 is a wasteful number, since it uses less digits than its factorization.

31131200130030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18187256 (or 18187253 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

Adding to 31131200130030 its reverse (3003100213113), we get a palindrome (34134300343143).

The spelling of 31131200130030 in words is "thirty-one trillion, one hundred thirty-one billion, two hundred million, one hundred thirty thousand, thirty".