45219491 has 4 divisors (see below), whose sum is σ = 45333792. Its totient is φ = 45105192.

The previous prime is 45219481. The next prime is 45219527. The reversal of 45219491 is 19491254.

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 45219491 - 2¹⁴ = 45203107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45219401) 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, 56555 + ... + 57348.

It is an arithmetic number, because the mean of its divisors is an integer number (11333448).

Almost surely, 2^45219491 is an apocalyptic number.

45219491 is a deficient number, since it is larger than the sum of its proper divisors (114301).

45219491 is a wasteful number, since it uses less digits than its factorization.

45219491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114300.

The product of its digits is 12960, while the sum is 35.

The square root of 45219491 is about 6724.5439250554. The cubic root of 45219491 is about 356.2666935442.

The spelling of 45219491 in words is "forty-five million, two hundred nineteen thousand, four hundred ninety-one".