151531970 has 16 divisors (see below), whose sum is σ = 273104568. Its totient is φ = 60535680.

The previous prime is 151531969. The next prime is 151531987. The reversal of 151531970 is 79135151.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 122036209 + 29495761 = 11047^2 + 5431^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1019 + ... + 17438.

Almost surely, 2^151531970 is an apocalyptic number.

151531970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

151531970 is a deficient number, since it is larger than the sum of its proper divisors (121572598).

151531970 is a wasteful number, since it uses less digits than its factorization.

151531970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19285.

The product of its (nonzero) digits is 4725, while the sum is 32.

The square root of 151531970 is about 12309.8322490601. The cubic root of 151531970 is about 533.1320069108.

The spelling of 151531970 in words is "one hundred fifty-one million, five hundred thirty-one thousand, nine hundred seventy".