551395977 has 32 divisors (see below), whose sum is σ = 836100096. Its totient is φ = 320198400.

The previous prime is 551395907. The next prime is 551395987. The reversal of 551395977 is 779593155.

It is not a de Polignac number, because 551395977 - 2⁷ = 551395849 is a prime.

It is not an unprimeable number, because it can be changed into a prime (551395907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 102753 + ... + 107985.

It is an arithmetic number, because the mean of its divisors is an integer number (26128128).

Almost surely, 2^551395977 is an apocalyptic number.

It is an amenable number.

551395977 is a deficient number, since it is larger than the sum of its proper divisors (284704119).

551395977 is a wasteful number, since it uses less digits than its factorization.

551395977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5381.

The product of its digits is 1488375, while the sum is 51.

The square root of 551395977 is about 23481.8222674476. The cubic root of 551395977 is about 820.0138689901.

It can be divided in two parts, 55139 and 5977, that added together give a palindrome (61116).

The spelling of 551395977 in words is "five hundred fifty-one million, three hundred ninety-five thousand, nine hundred seventy-seven".