151631657 has 4 divisors (see below), whose sum is σ = 152261076. Its totient is φ = 151002240.

The previous prime is 151631651. The next prime is 151631677. The reversal of 151631657 is 756136151.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 53304601 + 98327056 = 7301^2 + 9916^2 .

It is a cyclic number.

It is not a de Polignac number, because 151631657 - 2¹² = 151627561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (151631651) 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 in 3 ways as a sum of consecutive naturals, for example, 314348 + ... + 314829.

It is an arithmetic number, because the mean of its divisors is an integer number (38065269).

Almost surely, 2^151631657 is an apocalyptic number.

It is an amenable number.

151631657 is a deficient number, since it is larger than the sum of its proper divisors (629419).

151631657 is an equidigital number, since it uses as much as digits as its factorization.

151631657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 629418.

The product of its digits is 18900, while the sum is 35.

The square root of 151631657 is about 12313.8806637063. The cubic root of 151631657 is about 533.2488902332.

The spelling of 151631657 in words is "one hundred fifty-one million, six hundred thirty-one thousand, six hundred fifty-seven".