45815397 has 4 divisors (see below), whose sum is σ = 61087200. Its totient is φ = 30543596.

The previous prime is 45815387. The next prime is 45815401. The reversal of 45815397 is 79351854.

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 45815397 - 2⁴ = 45815381 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45815387) 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, 7635897 + ... + 7635902.

It is an arithmetic number, because the mean of its divisors is an integer number (15271800).

Almost surely, 2^45815397 is an apocalyptic number.

It is an amenable number.

45815397 is a deficient number, since it is larger than the sum of its proper divisors (15271803).

45815397 is a wasteful number, since it uses less digits than its factorization.

45815397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15271802.

The product of its digits is 151200, while the sum is 42.

The square root of 45815397 is about 6768.7071882303. The cubic root of 45815397 is about 357.8248391478.

The spelling of 45815397 in words is "forty-five million, eight hundred fifteen thousand, three hundred ninety-seven".