31452131 has 2 divisors, whose sum is σ = 31452132. Its totient is φ = 31452130.

The previous prime is 31452121. The next prime is 31452137. The reversal of 31452131 is 13125413.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31452131 is a prime.

It is a super-2 number, since 2×31452131² = 1978473088882322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31452137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15726065 + 15726066.

It is an arithmetic number, because the mean of its divisors is an integer number (15726066).

Almost surely, 2^31452131 is an apocalyptic number.

31452131 is a deficient number, since it is larger than the sum of its proper divisors (1).

31452131 is an equidigital number, since it uses as much as digits as its factorization.

31452131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 360, while the sum is 20.

The square root of 31452131 is about 5608.2199493244. The cubic root of 31452131 is about 315.6579210963.

Adding to 31452131 its reverse (13125413), we get a palindrome (44577544).

The spelling of 31452131 in words is "thirty-one million, four hundred fifty-two thousand, one hundred thirty-one".