45020031 has 16 divisors (see below), whose sum is σ = 70063104. Its totient is φ = 25177824.

The previous prime is 45020021. The next prime is 45020051. The reversal of 45020031 is 13002054.

It is not a de Polignac number, because 45020031 - 2¹⁸ = 44757887 is a prime.

It is a super-2 number, since 2×45020031² = 4053606382481922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45020021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21820 + ... + 23793.

It is an arithmetic number, because the mean of its divisors is an integer number (4378944).

Almost surely, 2^45020031 is an apocalyptic number.

45020031 is a deficient number, since it is larger than the sum of its proper divisors (25043073).

45020031 is a wasteful number, since it uses less digits than its factorization.

45020031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45670.

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 45020031 is about 6709.6967889764. The cubic root of 45020031 is about 355.7420990125.

Adding to 45020031 its reverse (13002054), we get a palindrome (58022085).

The spelling of 45020031 in words is "forty-five million, twenty thousand, thirty-one".