551531145 has 64 divisors (see below), whose sum is σ = 1057536000. Its totient is φ = 242288640.

The previous prime is 551531117. The next prime is 551531147. The reversal of 551531145 is 541135155.

551531145 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 551531145 - 2⁶ = 551531081 is a prime.

It is a super-2 number, since 2×551531145² = 608373207810022050, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (551531147) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 68281 + ... + 75929.

It is an arithmetic number, because the mean of its divisors is an integer number (16524000).

Almost surely, 2^551531145 is an apocalyptic number.

551531145 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

551531145 is a deficient number, since it is larger than the sum of its proper divisors (506004855).

551531145 is a wasteful number, since it uses less digits than its factorization.

551531145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7710.

The product of its digits is 7500, while the sum is 30.

The square root of 551531145 is about 23484.7002322789. The cubic root of 551531145 is about 820.0808689825.

The spelling of 551531145 in words is "five hundred fifty-one million, five hundred thirty-one thousand, one hundred forty-five".