31125636340 has 48 divisors (see below), whose sum is σ = 66433425408. Its totient is φ = 12247421184.

The previous prime is 31125636331. The next prime is 31125636349. The reversal of 31125636340 is 4363652113.

It is an interprime number because it is at equal distance from previous prime (31125636331) and next prime (31125636349).

It is a junction number, because it is equal to n+sod(n) for n = 31125636296 and 31125636305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31125636349) 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, 531349 + ... + 587011.

It is an arithmetic number, because the mean of its divisors is an integer number (1384029696).

Almost surely, 2^31125636340 is an apocalyptic number.

It is an amenable number.

31125636340 is an abundant number, since it is smaller than the sum of its proper divisors (35307789068).

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

31125636340 is a wasteful number, since it uses less digits than its factorization.

31125636340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56128 (or 56126 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 34.

The spelling of 31125636340 in words is "thirty-one billion, one hundred twenty-five million, six hundred thirty-six thousand, three hundred forty".