55777231 has 12 divisors (see below), whose sum is σ = 58963072. Its totient is φ = 52753536.

The previous prime is 55777229. The next prime is 55777259. The reversal of 55777231 is 13277755.

It is not a de Polignac number, because 55777231 - 2¹ = 55777229 is a prime.

It is a super-2 number, since 2×55777231² = 6222198996054722, which contains 22 as substring.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55778231) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 50770 + ... + 51856.

Almost surely, 2^55777231 is an apocalyptic number.

55777231 is a deficient number, since it is larger than the sum of its proper divisors (3185841).

55777231 is a wasteful number, since it uses less digits than its factorization.

55777231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1230 (or 1207 counting only the distinct ones).

The product of its digits is 51450, while the sum is 37.

The square root of 55777231 is about 7468.4155615499. The cubic root of 55777231 is about 382.0782507386.

The spelling of 55777231 in words is "fifty-five million, seven hundred seventy-seven thousand, two hundred thirty-one".