31249403248 has 20 divisors (see below), whose sum is σ = 69195107440. Its totient is φ = 13392601344.

The previous prime is 31249403243. The next prime is 31249403249. The reversal of 31249403248 is 84230494213.

It is a super-2 number, since 2×31249403248² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31249403248.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31249403243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 139506153 + ... + 139506376.

It is an arithmetic number, because the mean of its divisors is an integer number (3459755372).

Almost surely, 2^31249403248 is an apocalyptic number.

It is an amenable number.

31249403248 is an abundant number, since it is smaller than the sum of its proper divisors (37945704192).

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

31249403248 is a wasteful number, since it uses less digits than its factorization.

31249403248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279012544 (or 279012538 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 40.

The spelling of 31249403248 in words is "thirty-one billion, two hundred forty-nine million, four hundred three thousand, two hundred forty-eight".