54987157 has 4 divisors (see below), whose sum is σ = 55761696. Its totient is φ = 54212620.

The previous prime is 54987151. The next prime is 54987173. The reversal of 54987157 is 75178945.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 75178945 = 5 ⋅15035789.

It is a cyclic number.

It is not a de Polignac number, because 54987157 - 2⁷ = 54987029 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54987151) 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, 387163 + ... + 387304.

It is an arithmetic number, because the mean of its divisors is an integer number (13940424).

Almost surely, 2^54987157 is an apocalyptic number.

It is an amenable number.

54987157 is a deficient number, since it is larger than the sum of its proper divisors (774539).

54987157 is an equidigital number, since it uses as much as digits as its factorization.

54987157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 774538.

The product of its digits is 352800, while the sum is 46.

The square root of 54987157 is about 7415.3325616590. The cubic root of 54987157 is about 380.2656429728.

The spelling of 54987157 in words is "fifty-four million, nine hundred eighty-seven thousand, one hundred fifty-seven".