551508649 has 16 divisors (see below), whose sum is σ = 592260480. Its totient is φ = 512023680.

The previous prime is 551508647. The next prime is 551508653. The reversal of 551508649 is 946805155.

It is a cyclic number.

It is not a de Polignac number, because 551508649 - 2¹ = 551508647 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (551508647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 230439 + ... + 232819.

It is an arithmetic number, because the mean of its divisors is an integer number (37016280).

Almost surely, 2^551508649 is an apocalyptic number.

It is an amenable number.

551508649 is a deficient number, since it is larger than the sum of its proper divisors (40751831).

551508649 is a wasteful number, since it uses less digits than its factorization.

551508649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2640.

The product of its (nonzero) digits is 216000, while the sum is 43.

The square root of 551508649 is about 23484.2212772747. The cubic root of 551508649 is about 820.0697189383.

The spelling of 551508649 in words is "five hundred fifty-one million, five hundred eight thousand, six hundred forty-nine".