551116251 has 64 divisors (see below), whose sum is σ = 1011225600. Its totient is φ = 289433088.

The previous prime is 551116243. The next prime is 551116253. The reversal of 551116251 is 152611155.

551116251 is a `hidden beast` number, since 551 + 1 + 1 + 62 + 51 = 666.

It is not a de Polignac number, because 551116251 - 2³ = 551116243 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (551116253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 136165 + ... + 140153.

It is an arithmetic number, because the mean of its divisors is an integer number (15800400).

Almost surely, 2^551116251 is an apocalyptic number.

551116251 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

551116251 is a deficient number, since it is larger than the sum of its proper divisors (460109349).

551116251 is a wasteful number, since it uses less digits than its factorization.

551116251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4065 (or 4059 counting only the distinct ones).

The product of its digits is 1500, while the sum is 27.

The square root of 551116251 is about 23475.8652875671. The cubic root of 551116251 is about 819.8751797913.

The spelling of 551116251 in words is "five hundred fifty-one million, one hundred sixteen thousand, two hundred fifty-one".