31131354 has 16 divisors (see below), whose sum is σ = 62321760. Its totient is φ = 10367280.

The previous prime is 31131337. The next prime is 31131379. The reversal of 31131354 is 45313113.

It is a super-2 number, since 2×31131354² = 1938322403746632, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31131354.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7492 + ... + 10880.

It is an arithmetic number, because the mean of its divisors is an integer number (3895110).

Almost surely, 2^31131354 is an apocalyptic number.

31131354 is an abundant number, since it is smaller than the sum of its proper divisors (31190406).

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

31131354 is a wasteful number, since it uses less digits than its factorization.

31131354 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4925.

The product of its digits is 540, while the sum is 21.

The square root of 31131354 is about 5579.5478311419. The cubic root of 31131354 is about 314.5811313424.

Adding to 31131354 its reverse (45313113), we get a palindrome (76444467).

The spelling of 31131354 in words is "thirty-one million, one hundred thirty-one thousand, three hundred fifty-four".