45232991 has 4 divisors (see below), whose sum is σ = 45256512. Its totient is φ = 45209472.

The previous prime is 45232987. The next prime is 45233017. The reversal of 45232991 is 19923254.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 45232991 - 2² = 45232987 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45232931) 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, 8591 + ... + 12816.

It is an arithmetic number, because the mean of its divisors is an integer number (11314128).

Almost surely, 2^45232991 is an apocalyptic number.

45232991 is a deficient number, since it is larger than the sum of its proper divisors (23521).

45232991 is a wasteful number, since it uses less digits than its factorization.

45232991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23520.

The product of its digits is 19440, while the sum is 35.

The square root of 45232991 is about 6725.5476356948. The cubic root of 45232991 is about 356.3021437576.

The spelling of 45232991 in words is "forty-five million, two hundred thirty-two thousand, nine hundred ninety-one".