55656451 has 4 divisors (see below), whose sum is σ = 55814472. Its totient is φ = 55498432.

The previous prime is 55656421. The next prime is 55656467. The reversal of 55656451 is 15465655.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15465655 = 5 ⋅3093131.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55656451 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55656451.

It is not an unprimeable number, because it can be changed into a prime (55656401) 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, 78481 + ... + 79186.

It is an arithmetic number, because the mean of its divisors is an integer number (13953618).

Almost surely, 2^55656451 is an apocalyptic number.

55656451 is a deficient number, since it is larger than the sum of its proper divisors (158021).

55656451 is a wasteful number, since it uses less digits than its factorization.

55656451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158020.

The product of its digits is 90000, while the sum is 37.

The square root of 55656451 is about 7460.3251269633. The cubic root of 55656451 is about 381.8022673931.

The spelling of 55656451 in words is "fifty-five million, six hundred fifty-six thousand, four hundred fifty-one".