55977751 has 4 divisors (see below), whose sum is σ = 57343104. Its totient is φ = 54612400.

The previous prime is 55977739. The next prime is 55977767. The reversal of 55977751 is 15777955.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55977751 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55977721) 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, 682615 + ... + 682696.

It is an arithmetic number, because the mean of its divisors is an integer number (14335776).

Almost surely, 2^55977751 is an apocalyptic number.

55977751 is a deficient number, since it is larger than the sum of its proper divisors (1365353).

55977751 is a wasteful number, since it uses less digits than its factorization.

55977751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1365352.

The product of its digits is 385875, while the sum is 46.

The square root of 55977751 is about 7481.8280520204. The cubic root of 55977751 is about 382.5355622168.

The spelling of 55977751 in words is "fifty-five million, nine hundred seventy-seven thousand, seven hundred fifty-one".