55372661 has 4 divisors (see below), whose sum is σ = 57780192. Its totient is φ = 52965132.

The previous prime is 55372637. The next prime is 55372663. The reversal of 55372661 is 16627355.

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 55372661 - 2¹⁰ = 55371637 is a prime.

It is a super-2 number, since 2×55372661² = 6132263172441842, 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 (55372663) 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, 1203731 + ... + 1203776.

It is an arithmetic number, because the mean of its divisors is an integer number (14445048).

Almost surely, 2^55372661 is an apocalyptic number.

It is an amenable number.

55372661 is a deficient number, since it is larger than the sum of its proper divisors (2407531).

55372661 is a wasteful number, since it uses less digits than its factorization.

55372661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2407530.

The product of its digits is 37800, while the sum is 35.

The square root of 55372661 is about 7441.2808709254. The cubic root of 55372661 is about 381.1522298429.

The spelling of 55372661 in words is "fifty-five million, three hundred seventy-two thousand, six hundred sixty-one".