151531657 has 2 divisors, whose sum is σ = 151531658. Its totient is φ = 151531656.

The previous prime is 151531651. The next prime is 151531673. The reversal of 151531657 is 756135151.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 151265401 + 266256 = 12299^2 + 516^2 .

It is an emirp because it is prime and its reverse (756135151) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 151531657 - 2³ = 151531649 is a prime.

It is not a weakly prime, because it can be changed into another prime (151531651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 75765828 + 75765829.

It is an arithmetic number, because the mean of its divisors is an integer number (75765829).

Almost surely, 2^151531657 is an apocalyptic number.

It is an amenable number.

151531657 is a deficient number, since it is larger than the sum of its proper divisors (1).

151531657 is an equidigital number, since it uses as much as digits as its factorization.

151531657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15750, while the sum is 34.

The square root of 151531657 is about 12309.8195356390. The cubic root of 151531657 is about 533.1316398365.

The spelling of 151531657 in words is "one hundred fifty-one million, five hundred thirty-one thousand, six hundred fifty-seven".