45131555 has 16 divisors (see below), whose sum is σ = 65153280. Its totient is φ = 29318112.

The previous prime is 45131551. The next prime is 45131563. The reversal of 45131555 is 55513154.

It is a cyclic number.

It is not a de Polignac number, because 45131555 - 2² = 45131551 is a prime.

It is not an unprimeable number, because it can be changed into a prime (45131551) 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, 33269 + ... + 34598.

It is an arithmetic number, because the mean of its divisors is an integer number (4072080).

Almost surely, 2^45131555 is an apocalyptic number.

45131555 is a deficient number, since it is larger than the sum of its proper divisors (20021725).

45131555 is a wasteful number, since it uses less digits than its factorization.

45131555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67898.

The product of its digits is 7500, while the sum is 29.

The square root of 45131555 is about 6718.0023072339. The cubic root of 45131555 is about 356.0356058946.

The spelling of 45131555 in words is "forty-five million, one hundred thirty-one thousand, five hundred fifty-five".