551216431 has 2 divisors, whose sum is σ = 551216432. Its totient is φ = 551216430.

The previous prime is 551216389. The next prime is 551216447. The reversal of 551216431 is 134612155.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 551216431 - 2¹¹ = 551214383 is a prime.

It is a super-3 number, since 3×551216431³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 551216431.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (551216461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275608215 + 275608216.

It is an arithmetic number, because the mean of its divisors is an integer number (275608216).

Almost surely, 2^551216431 is an apocalyptic number.

551216431 is a deficient number, since it is larger than the sum of its proper divisors (1).

551216431 is an equidigital number, since it uses as much as digits as its factorization.

551216431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3600, while the sum is 28.

The square root of 551216431 is about 23477.9988712837. The cubic root of 551216431 is about 819.9248548033.

Adding to 551216431 its reverse (134612155), we get a palindrome (685828586).

The spelling of 551216431 in words is "five hundred fifty-one million, two hundred sixteen thousand, four hundred thirty-one".