55232815 has 8 divisors (see below), whose sum is σ = 72304848. Its totient is φ = 40169280.

The previous prime is 55232809. The next prime is 55232831. The reversal of 55232815 is 51823255.

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

It is not a de Polignac number, because 55232815 - 2¹³ = 55224623 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 502062 + ... + 502171.

It is an arithmetic number, because the mean of its divisors is an integer number (9038106).

Almost surely, 2^55232815 is an apocalyptic number.

55232815 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

55232815 is a deficient number, since it is larger than the sum of its proper divisors (17072033).

55232815 is a wasteful number, since it uses less digits than its factorization.

55232815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1004249.

The product of its digits is 12000, while the sum is 31.

The square root of 55232815 is about 7431.8782955589. The cubic root of 55232815 is about 380.8310873061.

It can be divided in two parts, 5523 and 2815, that added together give a palindrome (8338).

The spelling of 55232815 in words is "fifty-five million, two hundred thirty-two thousand, eight hundred fifteen".