157031801 has 2 divisors, whose sum is σ = 157031802. Its totient is φ = 157031800.

The previous prime is 157031773. The next prime is 157031851. The reversal of 157031801 is 108130751.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 108659776 + 48372025 = 10424^2 + 6955^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-157031801 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (157031851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78515900 + 78515901.

It is an arithmetic number, because the mean of its divisors is an integer number (78515901).

Almost surely, 2^157031801 is an apocalyptic number.

It is an amenable number.

157031801 is a deficient number, since it is larger than the sum of its proper divisors (1).

157031801 is an equidigital number, since it uses as much as digits as its factorization.

157031801 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 840, while the sum is 26.

The square root of 157031801 is about 12531.2330199386. The cubic root of 157031801 is about 539.5054926499.

The spelling of 157031801 in words is "one hundred fifty-seven million, thirty-one thousand, eight hundred one".