551131001 has 2 divisors, whose sum is σ = 551131002. Its totient is φ = 551131000.

The previous prime is 551130971. The next prime is 551131019. The reversal of 551131001 is 100131155.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 442471225 + 108659776 = 21035^2 + 10424^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-551131001 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (551131601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275565500 + 275565501.

It is an arithmetic number, because the mean of its divisors is an integer number (275565501).

Almost surely, 2^551131001 is an apocalyptic number.

It is an amenable number.

551131001 is a deficient number, since it is larger than the sum of its proper divisors (1).

551131001 is an equidigital number, since it uses as much as digits as its factorization.

551131001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 75, while the sum is 17.

The square root of 551131001 is about 23476.1794378898. The cubic root of 551131001 is about 819.8824940684.

Adding to 551131001 its reverse (100131155), we get a palindrome (651262156).

The spelling of 551131001 in words is "five hundred fifty-one million, one hundred thirty-one thousand, one".