31145496 has 64 divisors (see below), whose sum is σ = 86054400. Its totient is φ = 9343488.

The previous prime is 31145489. The next prime is 31145497. The reversal of 31145496 is 69454113.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31145497) 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, 7725 + ... + 11043.

It is an arithmetic number, because the mean of its divisors is an integer number (1344600).

Almost surely, 2^31145496 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31145496, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43027200).

31145496 is an abundant number, since it is smaller than the sum of its proper divisors (54908904).

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

31145496 is a wasteful number, since it uses less digits than its factorization.

31145496 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3368 (or 3364 counting only the distinct ones).

The product of its digits is 12960, while the sum is 33.

The square root of 31145496 is about 5580.8149942459. The cubic root of 31145496 is about 314.6287589194.

The spelling of 31145496 in words is "thirty-one million, one hundred forty-five thousand, four hundred ninety-six".