157731974 has 8 divisors (see below), whose sum is σ = 237064320. Its totient is φ = 78710536.

The previous prime is 157731971. The next prime is 157731979. The reversal of 157731974 is 479137751.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157731971) 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, 76454 + ... + 78489.

It is an arithmetic number, because the mean of its divisors is an integer number (29633040).

Almost surely, 2^157731974 is an apocalyptic number.

157731974 is a deficient number, since it is larger than the sum of its proper divisors (79332346).

157731974 is a wasteful number, since it uses less digits than its factorization.

157731974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155454.

The product of its digits is 185220, while the sum is 44.

The square root of 157731974 is about 12559.1390628498. The cubic root of 157731974 is about 540.3061524118.

The spelling of 157731974 in words is "one hundred fifty-seven million, seven hundred thirty-one thousand, nine hundred seventy-four".