56132987 has 4 divisors (see below), whose sum is σ = 56443296. Its totient is φ = 55822680.

The previous prime is 56132981. The next prime is 56133019. The reversal of 56132987 is 78923165.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78923165 = 5 ⋅15784633.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56132987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56132981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 154883 + ... + 155244.

It is an arithmetic number, because the mean of its divisors is an integer number (14110824).

Almost surely, 2^56132987 is an apocalyptic number.

56132987 is a deficient number, since it is larger than the sum of its proper divisors (310309).

56132987 is a wasteful number, since it uses less digits than its factorization.

56132987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310308.

The product of its digits is 90720, while the sum is 41.

The square root of 56132987 is about 7492.1950722068. The cubic root of 56132987 is about 382.8888483022. Note that the first 4 decimals are identical.

The spelling of 56132987 in words is "fifty-six million, one hundred thirty-two thousand, nine hundred eighty-seven".