31402901 has 2 divisors, whose sum is σ = 31402902. Its totient is φ = 31402900.

The previous prime is 31402867. The next prime is 31402913. The reversal of 31402901 is 10920413.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27984100 + 3418801 = 5290^2 + 1849^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31402901 is a prime.

It is a super-2 number, since 2×31402901² = 1972284382431602, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31402601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15701450 + 15701451.

It is an arithmetic number, because the mean of its divisors is an integer number (15701451).

Almost surely, 2^31402901 is an apocalyptic number.

It is an amenable number.

31402901 is a deficient number, since it is larger than the sum of its proper divisors (1).

31402901 is an equidigital number, since it uses as much as digits as its factorization.

31402901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 31402901 is about 5603.8291372953. The cubic root of 31402901 is about 315.4931420723.

The spelling of 31402901 in words is "thirty-one million, four hundred two thousand, nine hundred one".