55415507 has 8 divisors (see below), whose sum is σ = 65375232. Its totient is φ = 45966600.

The previous prime is 55415501. The next prime is 55415537. The reversal of 55415507 is 70551455.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55415507 - 2⁸ = 55415251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55415501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 127469 + ... + 127902.

It is an arithmetic number, because the mean of its divisors is an integer number (8171904).

Almost surely, 2^55415507 is an apocalyptic number.

55415507 is a deficient number, since it is larger than the sum of its proper divisors (9959725).

55415507 is a wasteful number, since it uses less digits than its factorization.

55415507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255409.

The product of its (nonzero) digits is 17500, while the sum is 32.

The square root of 55415507 is about 7444.1592540730. The cubic root of 55415507 is about 381.2505132305.

It can be divided in two parts, 554 and 15507, that added together give a palindrome (16061).

The spelling of 55415507 in words is "fifty-five million, four hundred fifteen thousand, five hundred seven".