55813971 has 16 divisors (see below), whose sum is σ = 75455744. Its totient is φ = 36694944.

The previous prime is 55813969. The next prime is 55813999. The reversal of 55813971 is 17931855.

It is not a de Polignac number, because 55813971 - 2¹ = 55813969 is a prime.

It is a Duffinian number.

Its product of digits (37800) is a multiple of the sum of its prime divisors (1050).

It is not an unprimeable number, because it can be changed into a prime (55812971) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76410 + ... + 77136.

It is an arithmetic number, because the mean of its divisors is an integer number (4715984).

Almost surely, 2^55813971 is an apocalyptic number.

55813971 is a deficient number, since it is larger than the sum of its proper divisors (19641773).

55813971 is a wasteful number, since it uses less digits than its factorization.

55813971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1050.

The product of its digits is 37800, while the sum is 39.

The square root of 55813971 is about 7470.8748483695. The cubic root of 55813971 is about 382.1621229189.

The spelling of 55813971 in words is "fifty-five million, eight hundred thirteen thousand, nine hundred seventy-one".