31492801 has 2 divisors, whose sum is σ = 31492802. Its totient is φ = 31492800.

The previous prime is 31492781. The next prime is 31492837. The reversal of 31492801 is 10829413.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20034576 + 11458225 = 4476^2 + 3385^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31492801 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31492801.

It is not a weakly prime, because it can be changed into another prime (31492841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15746400 + 15746401.

It is an arithmetic number, because the mean of its divisors is an integer number (15746401).

Almost surely, 2^31492801 is an apocalyptic number.

It is an amenable number.

31492801 is a deficient number, since it is larger than the sum of its proper divisors (1).

31492801 is an equidigital number, since it uses as much as digits as its factorization.

31492801 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 31492801 is about 5611.8447056204. The cubic root of 31492801 is about 315.7939190695.

The spelling of 31492801 in words is "thirty-one million, four hundred ninety-two thousand, eight hundred one".