151661140 has 24 divisors (see below), whose sum is σ = 320632200. Its totient is φ = 60256128.

The previous prime is 151661123. The next prime is 151661201. The reversal of 151661140 is 41166151.

It can be written as a sum of positive squares in 4 ways, for example, as 11048976 + 140612164 = 3324^2 + 11858^2 .

It is a super-2 number, since 2×151661140² = 46002202772199200, which contains 22 as substring.

It is a congruent number.

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, 22467 + ... + 28426.

It is an arithmetic number, because the mean of its divisors is an integer number (13359675).

Almost surely, 2^151661140 is an apocalyptic number.

151661140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

151661140 is an abundant number, since it is smaller than the sum of its proper divisors (168971060).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

151661140 is a wasteful number, since it uses less digits than its factorization.

151661140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51051 (or 51049 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 151661140 is about 12315.0777504651. The cubic root of 151661140 is about 533.2834493274.

The spelling of 151661140 in words is "one hundred fifty-one million, six hundred sixty-one thousand, one hundred forty".