45809531 has 4 divisors (see below), whose sum is σ = 47389200. Its totient is φ = 44229864.

The previous prime is 45809507. The next prime is 45809557. The reversal of 45809531 is 13590854.

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 45809531 - 2¹⁰ = 45808507 is a prime.

It is a super-2 number, since 2×45809531² = 4197026260879922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 45809491 and 45809500.

It is not an unprimeable number, because it can be changed into a prime (45809591) 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, 789791 + ... + 789848.

It is an arithmetic number, because the mean of its divisors is an integer number (11847300).

Almost surely, 2^45809531 is an apocalyptic number.

45809531 is a deficient number, since it is larger than the sum of its proper divisors (1579669).

45809531 is a wasteful number, since it uses less digits than its factorization.

45809531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1579668.

The product of its (nonzero) digits is 21600, while the sum is 35.

The square root of 45809531 is about 6768.2738567525. The cubic root of 45809531 is about 357.8095670615.

The spelling of 45809531 in words is "forty-five million, eight hundred nine thousand, five hundred thirty-one".