551337861 has 16 divisors (see below), whose sum is σ = 743112704. Its totient is φ = 363578544.

The previous prime is 551337833. The next prime is 551337893. The reversal of 551337861 is 168733155.

It is a happy number.

It is not a de Polignac number, because 551337861 - 2⁷ = 551337733 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 (551337361) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 137856 + ... + 141798.

It is an arithmetic number, because the mean of its divisors is an integer number (46444544).

Almost surely, 2^551337861 is an apocalyptic number.

It is an amenable number.

551337861 is a deficient number, since it is larger than the sum of its proper divisors (191774843).

551337861 is a wasteful number, since it uses less digits than its factorization.

551337861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4440.

The product of its digits is 75600, while the sum is 39.

The square root of 551337861 is about 23480.5847669942. The cubic root of 551337861 is about 819.9850587204.

The spelling of 551337861 in words is "five hundred fifty-one million, three hundred thirty-seven thousand, eight hundred sixty-one".