55839971 has 8 divisors (see below), whose sum is σ = 61520688. Its totient is φ = 50260000.

The previous prime is 55839961. The next prime is 55839977. The reversal of 55839971 is 17993855.

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 55839971 - 2¹⁸ = 55577827 is a prime.

It is a super-2 number, since 2×55839971² = 6236204722561682, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55839977) 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, 24020 + ... + 26241.

It is an arithmetic number, because the mean of its divisors is an integer number (7690086).

Almost surely, 2^55839971 is an apocalyptic number.

55839971 is a deficient number, since it is larger than the sum of its proper divisors (5680717).

55839971 is a wasteful number, since it uses less digits than its factorization.

55839971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50373.

The product of its digits is 340200, while the sum is 47.

The square root of 55839971 is about 7472.6147364895. The cubic root of 55839971 is about 382.2214549735.

The spelling of 55839971 in words is "fifty-five million, eight hundred thirty-nine thousand, nine hundred seventy-one".