31055248 has 20 divisors (see below), whose sum is σ = 68765440. Its totient is φ = 13309344.

The previous prime is 31055239. The next prime is 31055257. The reversal of 31055248 is 84255013.

It is an interprime number because it is at equal distance from previous prime (31055239) and next prime (31055257).

It is a Harshad number since it is a multiple of its sum of digits (28).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138528 + ... + 138751.

It is an arithmetic number, because the mean of its divisors is an integer number (3438272).

Almost surely, 2^31055248 is an apocalyptic number.

It is an amenable number.

31055248 is an abundant number, since it is smaller than the sum of its proper divisors (37710192).

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

31055248 is a wasteful number, since it uses less digits than its factorization.

31055248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277294 (or 277288 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 31055248 is about 5572.7235711096. The cubic root of 31055248 is about 314.3245727632.

The spelling of 31055248 in words is "thirty-one million, fifty-five thousand, two hundred forty-eight".