54642157 has 4 divisors (see below), whose sum is σ = 57518080. Its totient is φ = 51766236.

The previous prime is 54642143. The next prime is 54642163. The reversal of 54642157 is 75124645.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-54642157 is a prime.

It is a super-2 number, since 2×54642157² = 5971530643225298, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54642127) 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, 1437933 + ... + 1437970.

It is an arithmetic number, because the mean of its divisors is an integer number (14379520).

Almost surely, 2^54642157 is an apocalyptic number.

It is an amenable number.

54642157 is a deficient number, since it is larger than the sum of its proper divisors (2875923).

54642157 is a wasteful number, since it uses less digits than its factorization.

54642157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2875922.

The product of its digits is 33600, while the sum is 34.

The square root of 54642157 is about 7392.0333467863. The cubic root of 54642157 is about 379.4686872940.

The spelling of 54642157 in words is "fifty-four million, six hundred forty-two thousand, one hundred fifty-seven".