551404031 has 2 divisors, whose sum is σ = 551404032. Its totient is φ = 551404030.

The previous prime is 551403991. The next prime is 551404033. The reversal of 551404031 is 130404155.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 551404031 - 2¹⁴ = 551387647 is a prime.

It is a super-2 number, since 2×551404031² = 608092810806097922, which contains 22 as substring.

Together with 551404033, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 551403988 and 551404006.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (551404033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275702015 + 275702016.

It is an arithmetic number, because the mean of its divisors is an integer number (275702016).

Almost surely, 2^551404031 is an apocalyptic number.

551404031 is a deficient number, since it is larger than the sum of its proper divisors (1).

551404031 is an equidigital number, since it uses as much as digits as its factorization.

551404031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 551404031 is about 23481.9937611779. The cubic root of 551404031 is about 820.0178614987.

Adding to 551404031 its reverse (130404155), we get a palindrome (681808186).

The spelling of 551404031 in words is "five hundred fifty-one million, four hundred four thousand, thirty-one".