551257493 has 2 divisors, whose sum is σ = 551257494. Its totient is φ = 551257492.

The previous prime is 551257477. The next prime is 551257579. The reversal of 551257493 is 394752155.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 450415729 + 100841764 = 21223^2 + 10042^2 .

It is a cyclic number.

It is not a de Polignac number, because 551257493 - 2⁴ = 551257477 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 551257493.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (551256493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275628746 + 275628747.

It is an arithmetic number, because the mean of its divisors is an integer number (275628747).

Almost surely, 2^551257493 is an apocalyptic number.

It is an amenable number.

551257493 is a deficient number, since it is larger than the sum of its proper divisors (1).

551257493 is an equidigital number, since it uses as much as digits as its factorization.

551257493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 189000, while the sum is 41.

The square root of 551257493 is about 23478.8733332756. The cubic root of 551257493 is about 819.9452139681.

The spelling of 551257493 in words is "five hundred fifty-one million, two hundred fifty-seven thousand, four hundred ninety-three".