56777551 has 4 divisors (see below), whose sum is σ = 57985632. Its totient is φ = 55569472.

The previous prime is 56777549. The next prime is 56777629. The reversal of 56777551 is 15577765.

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 56777551 - 2¹ = 56777549 is a prime.

It is a super-3 number, since 3×56777551³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 56777498 and 56777507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56777531) 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, 603970 + ... + 604063.

It is an arithmetic number, because the mean of its divisors is an integer number (14496408).

Almost surely, 2^56777551 is an apocalyptic number.

56777551 is a deficient number, since it is larger than the sum of its proper divisors (1208081).

56777551 is a wasteful number, since it uses less digits than its factorization.

56777551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1208080.

The product of its digits is 257250, while the sum is 43.

The square root of 56777551 is about 7535.0879888691. The cubic root of 56777551 is about 384.3488199588.

The spelling of 56777551 in words is "fifty-six million, seven hundred seventy-seven thousand, five hundred fifty-one".