55623641 has 6 divisors (see below), whose sum is σ = 57476826. Its totient is φ = 53828400.

The previous prime is 55623619. The next prime is 55623661. The reversal of 55623641 is 14632655.

It can be written as a sum of positive squares in only one way, i.e., 32535616 + 23088025 = 5704^2 + 4805^2 .

It is not a de Polignac number, because 55623641 - 2⁶ = 55623577 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55623598 and 55623607.

It is not an unprimeable number, because it can be changed into a prime (55623661) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 27980 + ... + 29901.

It is an arithmetic number, because the mean of its divisors is an integer number (9579471).

Almost surely, 2^55623641 is an apocalyptic number.

It is an amenable number.

55623641 is a deficient number, since it is larger than the sum of its proper divisors (1853185).

55623641 is an equidigital number, since it uses as much as digits as its factorization.

55623641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57943 (or 57912 counting only the distinct ones).

The product of its digits is 21600, while the sum is 32.

The square root of 55623641 is about 7458.1258369647. The cubic root of 55623641 is about 381.7272273061.

The spelling of 55623641 in words is "fifty-five million, six hundred twenty-three thousand, six hundred forty-one".