31602401 has 2 divisors, whose sum is σ = 31602402. Its totient is φ = 31602400.

The previous prime is 31602397. The next prime is 31602421. The reversal of 31602401 is 10420613.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20205025 + 11397376 = 4495^2 + 3376^2 .

It is a cyclic number.

It is not a de Polignac number, because 31602401 - 2² = 31602397 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 31602401.

It is not a weakly prime, because it can be changed into another prime (31602421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15801200 + 15801201.

It is an arithmetic number, because the mean of its divisors is an integer number (15801201).

Almost surely, 2^31602401 is an apocalyptic number.

It is an amenable number.

31602401 is a deficient number, since it is larger than the sum of its proper divisors (1).

31602401 is an equidigital number, since it uses as much as digits as its factorization.

31602401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 31602401 is about 5621.6012843317. The cubic root of 31602401 is about 316.1598327519.

The spelling of 31602401 in words is "thirty-one million, six hundred two thousand, four hundred one".