45031731 has 4 divisors (see below), whose sum is σ = 60042312. Its totient is φ = 30021152.

The previous prime is 45031711. The next prime is 45031741. The reversal of 45031731 is 13713054.

45031731 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 45031731 - 2¹¹ = 45029683 is a prime.

It is a super-2 number, since 2×45031731² = 4055713593712722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (45031711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7505286 + ... + 7505291.

It is an arithmetic number, because the mean of its divisors is an integer number (15010578).

Almost surely, 2^45031731 is an apocalyptic number.

45031731 is a deficient number, since it is larger than the sum of its proper divisors (15010581).

45031731 is a wasteful number, since it uses less digits than its factorization.

45031731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15010580.

The product of its (nonzero) digits is 1260, while the sum is 24.

The square root of 45031731 is about 6710.5686048203. The cubic root of 45031731 is about 355.7729136074.

Adding to 45031731 its reverse (13713054), we get a palindrome (58744785).

The spelling of 45031731 in words is "forty-five million, thirty-one thousand, seven hundred thirty-one".