45131919 has 8 divisors (see below), whose sum is σ = 68772480. Its totient is φ = 25789656.

The previous prime is 45131903. The next prime is 45131927. The reversal of 45131919 is 91913154.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 45131919 - 2⁴ = 45131903 is a prime.

It is a super-2 number, since 2×45131919² = 4073780225245122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 45131919.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45131959) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1074549 + ... + 1074590.

It is an arithmetic number, because the mean of its divisors is an integer number (8596560).

Almost surely, 2^45131919 is an apocalyptic number.

45131919 is a deficient number, since it is larger than the sum of its proper divisors (23640561).

45131919 is a wasteful number, since it uses less digits than its factorization.

45131919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2149149.

The product of its digits is 4860, while the sum is 33.

The square root of 45131919 is about 6718.0293985662. The cubic root of 45131919 is about 356.0365630712.

The spelling of 45131919 in words is "forty-five million, one hundred thirty-one thousand, nine hundred nineteen".