45042031 has 4 divisors (see below), whose sum is σ = 45291064. Its totient is φ = 44793000.

The previous prime is 45042007. The next prime is 45042059. The reversal of 45042031 is 13024054.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13024054 = 2 ⋅6512027.

It is a cyclic number.

It is not a de Polignac number, because 45042031 - 2⁹ = 45041519 is a prime.

It is a super-2 number, since 2×45042031² = 4057569113209922, 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 (45042001) 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, 124245 + ... + 124606.

It is an arithmetic number, because the mean of its divisors is an integer number (11322766).

Almost surely, 2^45042031 is an apocalyptic number.

45042031 is a deficient number, since it is larger than the sum of its proper divisors (249033).

45042031 is a wasteful number, since it uses less digits than its factorization.

45042031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249032.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 45042031 is about 6711.3360070853. The cubic root of 45042031 is about 355.8000365684.

Adding to 45042031 its reverse (13024054), we get a palindrome (58066085).

The spelling of 45042031 in words is "forty-five million, forty-two thousand, thirty-one".