53157987 has 12 divisors (see below), whose sum is σ = 78418080. Its totient is φ = 34684368.

The previous prime is 53157961. The next prime is 53158051. The reversal of 53157987 is 78975135.

It is not a de Polignac number, because 53157987 - 2⁷ = 53157859 is a prime.

It is not an unprimeable number, because it can be changed into a prime (53157947) 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 11 ways as a sum of consecutive naturals, for example, 62412 + ... + 63257.

It is an arithmetic number, because the mean of its divisors is an integer number (6534840).

Almost surely, 2^53157987 is an apocalyptic number.

53157987 is a deficient number, since it is larger than the sum of its proper divisors (25260093).

53157987 is a wasteful number, since it uses less digits than its factorization.

53157987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125722 (or 125719 counting only the distinct ones).

The product of its digits is 264600, while the sum is 45.

The square root of 53157987 is about 7290.9524069219. The cubic root of 53157987 is about 376.0014405973.

The spelling of 53157987 in words is "fifty-three million, one hundred fifty-seven thousand, nine hundred eighty-seven".