551101565 has 16 divisors (see below), whose sum is σ = 762490368. Its totient is φ = 374551296.

The previous prime is 551101561. The next prime is 551101567. The reversal of 551101565 is 565101155.

It is a happy number.

It is not a de Polignac number, because 551101565 - 2² = 551101561 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 65717 + ... + 73626.

It is an arithmetic number, because the mean of its divisors is an integer number (47655648).

Almost surely, 2^551101565 is an apocalyptic number.

It is an amenable number.

551101565 is a deficient number, since it is larger than the sum of its proper divisors (211388803).

551101565 is a wasteful number, since it uses less digits than its factorization.

551101565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139468.

The product of its (nonzero) digits is 3750, while the sum is 29.

The square root of 551101565 is about 23475.5524961608. The cubic root of 551101565 is about 819.8678971210.

The spelling of 551101565 in words is "five hundred fifty-one million, one hundred one thousand, five hundred sixty-five".