545155551 has 6 divisors (see below), whose sum is σ = 787446920. Its totient is φ = 363437028.

The previous prime is 545155531. The next prime is 545155561. The reversal of 545155551 is 155551545.

545155551 is a `hidden beast` number, since 5 + 4 + 51 + 55 + 551 = 666.

It is not a de Polignac number, because 545155551 - 2⁵ = 545155519 is a prime.

It is a super-2 number, since 2×545155551² = 594389149572227202, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (545155531) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 30286411 + ... + 30286428.

Almost surely, 2^545155551 is an apocalyptic number.

545155551 is a deficient number, since it is larger than the sum of its proper divisors (242291369).

545155551 is a wasteful number, since it uses less digits than its factorization.

545155551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60572845 (or 60572842 counting only the distinct ones).

The product of its digits is 62500, while the sum is 36.

The square root of 545155551 is about 23348.5663585583. The cubic root of 545155551 is about 816.9086214828.

The spelling of 545155551 in words is "five hundred forty-five million, one hundred fifty-five thousand, five hundred fifty-one".