55767971 has 4 divisors (see below), whose sum is σ = 63734832. Its totient is φ = 47801112.

The previous prime is 55767967. The next prime is 55767979. The reversal of 55767971 is 17976755.

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 55767971 - 2² = 55767967 is a prime.

It is a super-2 number, since 2×55767971² = 6220133178913682, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55767979) 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, 3983420 + ... + 3983433.

It is an arithmetic number, because the mean of its divisors is an integer number (15933708).

Almost surely, 2^55767971 is an apocalyptic number.

55767971 is a deficient number, since it is larger than the sum of its proper divisors (7966861).

55767971 is an equidigital number, since it uses as much as digits as its factorization.

55767971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7966860.

The product of its digits is 463050, while the sum is 47.

The square root of 55767971 is about 7467.7955917392. The cubic root of 55767971 is about 382.0571056683.

The spelling of 55767971 in words is "fifty-five million, seven hundred sixty-seven thousand, nine hundred seventy-one".