45187157 has 4 divisors (see below), whose sum is σ = 47151840. Its totient is φ = 43222476.

The previous prime is 45187151. The next prime is 45187171. The reversal of 45187157 is 75178154.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 45187157 - 2¹⁰ = 45186133 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 45187157.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45187151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 982307 + ... + 982352.

It is an arithmetic number, because the mean of its divisors is an integer number (11787960).

Almost surely, 2^45187157 is an apocalyptic number.

It is an amenable number.

45187157 is a deficient number, since it is larger than the sum of its proper divisors (1964683).

45187157 is a wasteful number, since it uses less digits than its factorization.

45187157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1964682.

The product of its digits is 39200, while the sum is 38.

The square root of 45187157 is about 6722.1393172114. The cubic root of 45187157 is about 356.1817576477.

The spelling of 45187157 in words is "forty-five million, one hundred eighty-seven thousand, one hundred fifty-seven".