55488831 has 4 divisors (see below), whose sum is σ = 73985112. Its totient is φ = 36992552.

The previous prime is 55488817. The next prime is 55488841. The reversal of 55488831 is 13888455.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 55488831 - 2¹⁰ = 55487807 is a prime.

It is a super-2 number, since 2×55488831² = 6158020731493122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55488841) 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, 9248136 + ... + 9248141.

It is an arithmetic number, because the mean of its divisors is an integer number (18496278).

Almost surely, 2^55488831 is an apocalyptic number.

55488831 is a deficient number, since it is larger than the sum of its proper divisors (18496281).

55488831 is a wasteful number, since it uses less digits than its factorization.

55488831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18496280.

The product of its digits is 153600, while the sum is 42.

The square root of 55488831 is about 7449.0825609601. The cubic root of 55488831 is about 381.4185918880.

The spelling of 55488831 in words is "fifty-five million, four hundred eighty-eight thousand, eight hundred thirty-one".