551100561 has 16 divisors (see below), whose sum is σ = 805410048. Its totient is φ = 332413200.

The previous prime is 551100559. The next prime is 551100587. The reversal of 551100561 is 165001155.

It is not a de Polignac number, because 551100561 - 2¹ = 551100559 is a prime.

It is not an unprimeable number, because it can be changed into a prime (551101561) 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, 32611 + ... + 46536.

It is an arithmetic number, because the mean of its divisors is an integer number (50338128).

Almost surely, 2^551100561 is an apocalyptic number.

It is an amenable number.

551100561 is a deficient number, since it is larger than the sum of its proper divisors (254309487).

551100561 is a wasteful number, since it uses less digits than its factorization.

551100561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79372.

The product of its (nonzero) digits is 750, while the sum is 24.

The square root of 551100561 is about 23475.5311122028. The cubic root of 551100561 is about 819.8673992407.

The spelling of 551100561 in words is "five hundred fifty-one million, one hundred thousand, five hundred sixty-one".