55621260 has 36 divisors (see below), whose sum is σ = 168718368. Its totient is φ = 14832288.

The previous prime is 55621259. The next prime is 55621261. The reversal of 55621260 is 6212655.

It is an interprime number because it is at equal distance from previous prime (55621259) and next prime (55621261).

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (55621261) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 154324 + ... + 154683.

Almost surely, 2^55621260 is an apocalyptic number.

It is an amenable number.

55621260 is an abundant number, since it is smaller than the sum of its proper divisors (113097108).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55621260 is a wasteful number, since it uses less digits than its factorization.

55621260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309022 (or 309017 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 55621260 is about 7457.9662107038. The cubic root of 55621260 is about 381.7217805483.

It can be divided in two parts, 5 and 5621260, that added together give a palindrome (5621265).

The spelling of 55621260 in words is "fifty-five million, six hundred twenty-one thousand, two hundred sixty".