31412257 has 2 divisors, whose sum is σ = 31412258. Its totient is φ = 31412256.

The previous prime is 31412239. The next prime is 31412261. The reversal of 31412257 is 75221413.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19571776 + 11840481 = 4424^2 + 3441^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31412257 is a prime.

It is not a weakly prime, because it can be changed into another prime (31412267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15706128 + 15706129.

It is an arithmetic number, because the mean of its divisors is an integer number (15706129).

Almost surely, 2^31412257 is an apocalyptic number.

It is an amenable number.

31412257 is a deficient number, since it is larger than the sum of its proper divisors (1).

31412257 is an equidigital number, since it uses as much as digits as its factorization.

31412257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1680, while the sum is 25.

The square root of 31412257 is about 5604.6638614640. The cubic root of 31412257 is about 315.5244710329.

The spelling of 31412257 in words is "thirty-one million, four hundred twelve thousand, two hundred fifty-seven".