45188251 has 16 divisors (see below), whose sum is σ = 48885760. Its totient is φ = 41640480.

The previous prime is 45188233. The next prime is 45188257. The reversal of 45188251 is 15288154.

It is a cyclic number.

It is not a de Polignac number, because 45188251 - 2⁵ = 45188219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45188257) 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, 147040 + ... + 147346.

It is an arithmetic number, because the mean of its divisors is an integer number (3055360).

Almost surely, 2^45188251 is an apocalyptic number.

45188251 is a deficient number, since it is larger than the sum of its proper divisors (3697509).

45188251 is a wasteful number, since it uses less digits than its factorization.

45188251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 514.

The product of its digits is 12800, while the sum is 34.

The square root of 45188251 is about 6722.2206896233. The cubic root of 45188251 is about 356.1846320610.

It can be divided in two parts, 4518 and 8251, that added together give a square (12769 = 113²).

The spelling of 45188251 in words is "forty-five million, one hundred eighty-eight thousand, two hundred fifty-one".