551628457 has 2 divisors, whose sum is σ = 551628458. Its totient is φ = 551628456.

The previous prime is 551628431. The next prime is 551628509. The reversal of 551628457 is 754826155.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 531025936 + 20602521 = 23044^2 + 4539^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-551628457 is a prime.

It is not a weakly prime, because it can be changed into another prime (551628557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275814228 + 275814229.

It is an arithmetic number, because the mean of its divisors is an integer number (275814229).

Almost surely, 2^551628457 is an apocalyptic number.

It is an amenable number.

551628457 is a deficient number, since it is larger than the sum of its proper divisors (1).

551628457 is an equidigital number, since it uses as much as digits as its factorization.

551628457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 336000, while the sum is 43.

The square root of 551628457 is about 23486.7719578490. The cubic root of 551628457 is about 820.1290977587.

The spelling of 551628457 in words is "five hundred fifty-one million, six hundred twenty-eight thousand, four hundred fifty-seven".