151455681 has 24 divisors (see below), whose sum is σ = 241351656. Its totient is φ = 90927360.

The previous prime is 151455679. The next prime is 151455691. The reversal of 151455681 is 186554151.

151455681 is a `hidden beast` number, since 1 + 51 + 45 + 568 + 1 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 2005056 + 149450625 = 1416^2 + 12225^2 .

It is not a de Polignac number, because 151455681 - 2¹ = 151455679 is a prime.

It is a super-2 number, since 2×151455681² = 45877646614347522, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (151455671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10990 + ... + 20583.

It is an arithmetic number, because the mean of its divisors is an integer number (10056319).

Almost surely, 2^151455681 is an apocalyptic number.

It is an amenable number.

151455681 is a deficient number, since it is larger than the sum of its proper divisors (89895975).

151455681 is a wasteful number, since it uses less digits than its factorization.

151455681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31633 (or 31630 counting only the distinct ones).

The product of its digits is 24000, while the sum is 36.

The square root of 151455681 is about 12306.7331570974. The cubic root of 151455681 is about 533.0425231865.

The spelling of 151455681 in words is "one hundred fifty-one million, four hundred fifty-five thousand, six hundred eighty-one".