551623825 has 6 divisors (see below), whose sum is σ = 684013574. Its totient is φ = 441299040.

The previous prime is 551623781. The next prime is 551623829. The reversal of 551623825 is 528326155.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 21150801 + 530473024 = 4599^2 + 23032^2 .

It is not a de Polignac number, because 551623825 - 2⁹ = 551623313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (551623829) 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 in 5 ways as a sum of consecutive naturals, for example, 11032452 + ... + 11032501.

Almost surely, 2^551623825 is an apocalyptic number.

It is an amenable number.

551623825 is a deficient number, since it is larger than the sum of its proper divisors (132389749).

551623825 is a wasteful number, since it uses less digits than its factorization.

551623825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22064963 (or 22064958 counting only the distinct ones).

The product of its digits is 72000, while the sum is 37.

The square root of 551623825 is about 23486.6733489441. The cubic root of 551623825 is about 820.1268022229.

The spelling of 551623825 in words is "five hundred fifty-one million, six hundred twenty-three thousand, eight hundred twenty-five".