157131641 has 2 divisors, whose sum is σ = 157131642. Its totient is φ = 157131640.

The previous prime is 157131631. The next prime is 157131643. The reversal of 157131641 is 146131751.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 82810000 + 74321641 = 9100^2 + 8621^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-157131641 is a prime.

Together with 157131643, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (157131643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78565820 + 78565821.

It is an arithmetic number, because the mean of its divisors is an integer number (78565821).

Almost surely, 2^157131641 is an apocalyptic number.

It is an amenable number.

157131641 is a deficient number, since it is larger than the sum of its proper divisors (1).

157131641 is an equidigital number, since it uses as much as digits as its factorization.

157131641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2520, while the sum is 29.

The square root of 157131641 is about 12535.2160332401. The cubic root of 157131641 is about 539.6198066860.

The spelling of 157131641 in words is "one hundred fifty-seven million, one hundred thirty-one thousand, six hundred forty-one".