551530091 has 16 divisors (see below), whose sum is σ = 652847040. Its totient is φ = 455884800.

The previous prime is 551530051. The next prime is 551530093. The reversal of 551530091 is 190035155.

It is a happy number.

It is not a de Polignac number, because 551530091 - 2⁶ = 551530027 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (551530093) 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, 324155 + ... + 325851.

It is an arithmetic number, because the mean of its divisors is an integer number (40802940).

Almost surely, 2^551530091 is an apocalyptic number.

551530091 is a deficient number, since it is larger than the sum of its proper divisors (101316949).

551530091 is a wasteful number, since it uses less digits than its factorization.

551530091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3334.

The product of its (nonzero) digits is 3375, while the sum is 29.

The square root of 551530091 is about 23484.6777921265. The cubic root of 551530091 is about 820.0803465788.

The spelling of 551530091 in words is "five hundred fifty-one million, five hundred thirty thousand, ninety-one".