31198801 has 2 divisors, whose sum is σ = 31198802. Its totient is φ = 31198800.

The previous prime is 31198781. The next prime is 31198819. The reversal of 31198801 is 10889113.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21902400 + 9296401 = 4680^2 + 3049^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31198801 is a prime.

It is not a weakly prime, because it can be changed into another prime (31198831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15599400 + 15599401.

It is an arithmetic number, because the mean of its divisors is an integer number (15599401).

Almost surely, 2^31198801 is an apocalyptic number.

It is an amenable number.

31198801 is a deficient number, since it is larger than the sum of its proper divisors (1).

31198801 is an equidigital number, since it uses as much as digits as its factorization.

31198801 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 31.

The square root of 31198801 is about 5585.5886887597. The cubic root of 31198801 is about 314.8081505844.

The spelling of 31198801 in words is "thirty-one million, one hundred ninety-eight thousand, eight hundred one".