45631519 has 4 divisors (see below), whose sum is σ = 48315744. Its totient is φ = 42947296.

The previous prime is 45631507. The next prime is 45631543. The reversal of 45631519 is 91513654.

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 45631519 - 2²¹ = 43534367 is a prime.

It is a super-2 number, since 2×45631519² = 4164471052494722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45631919) 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, 1342087 + ... + 1342120.

It is an arithmetic number, because the mean of its divisors is an integer number (12078936).

Almost surely, 2^45631519 is an apocalyptic number.

45631519 is a deficient number, since it is larger than the sum of its proper divisors (2684225).

45631519 is a wasteful number, since it uses less digits than its factorization.

45631519 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2684224.

The product of its digits is 16200, while the sum is 34.

The square root of 45631519 is about 6755.1105838469. The cubic root of 45631519 is about 357.3454927555.

The spelling of 45631519 in words is "forty-five million, six hundred thirty-one thousand, five hundred nineteen".