551191937 has 2 divisors, whose sum is σ = 551191938. Its totient is φ = 551191936.

The previous prime is 551191933. The next prime is 551191939. The reversal of 551191937 is 739191155.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 549855601 + 1336336 = 23449^2 + 1156^2 .

It is a cyclic number.

It is not a de Polignac number, because 551191937 - 2² = 551191933 is a prime.

Together with 551191939, 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 = 551191894 and 551191903.

It is not a weakly prime, because it can be changed into another prime (551191933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275595968 + 275595969.

It is an arithmetic number, because the mean of its divisors is an integer number (275595969).

Almost surely, 2^551191937 is an apocalyptic number.

It is an amenable number.

551191937 is a deficient number, since it is larger than the sum of its proper divisors (1).

551191937 is an equidigital number, since it uses as much as digits as its factorization.

551191937 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 42525, while the sum is 41.

The square root of 551191937 is about 23477.4772281862. The cubic root of 551191937 is about 819.9127098238.

The spelling of 551191937 in words is "five hundred fifty-one million, one hundred ninety-one thousand, nine hundred thirty-seven".