54538661 has 4 divisors (see below), whose sum is σ = 54560352. Its totient is φ = 54516972.

The previous prime is 54538657. The next prime is 54538709. The reversal of 54538661 is 16683545.

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 not a de Polignac number, because 54538661 - 2² = 54538657 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54532661) 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, 6491 + ... + 12296.

It is an arithmetic number, because the mean of its divisors is an integer number (13640088).

Almost surely, 2^54538661 is an apocalyptic number.

It is an amenable number.

54538661 is a deficient number, since it is larger than the sum of its proper divisors (21691).

54538661 is a wasteful number, since it uses less digits than its factorization.

54538661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21690.

The product of its digits is 86400, while the sum is 38.

The square root of 54538661 is about 7385.0295192369. The cubic root of 54538661 is about 379.2289559516.

The spelling of 54538661 in words is "fifty-four million, five hundred thirty-eight thousand, six hundred sixty-one".