55403617 has 4 divisors (see below), whose sum is σ = 55449856. Its totient is φ = 55357380.

The previous prime is 55403611. The next prime is 55403633. The reversal of 55403617 is 71630455.

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 55403617 - 2³ = 55403609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55403611) 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, 21273 + ... + 23734.

It is an arithmetic number, because the mean of its divisors is an integer number (13862464).

Almost surely, 2^55403617 is an apocalyptic number.

It is an amenable number.

55403617 is a deficient number, since it is larger than the sum of its proper divisors (46239).

55403617 is a wasteful number, since it uses less digits than its factorization.

55403617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46238.

The product of its (nonzero) digits is 12600, while the sum is 31.

The square root of 55403617 is about 7443.3605985469. The cubic root of 55403617 is about 381.2232441315.

The spelling of 55403617 in words is "fifty-five million, four hundred three thousand, six hundred seventeen".