45131331 has 8 divisors (see below), whose sum is σ = 68771584. Its totient is φ = 25789320.

The previous prime is 45131323. The next prime is 45131351. The reversal of 45131331 is 13313154.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 45131331 - 2³ = 45131323 is a prime.

It is a super-2 number, since 2×45131331² = 4073674075663122, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 2149111 = 45131331 / (4 + 5 + 1 + 3 + 1 + 3 + 3 + 1).

It is a junction number, because it is equal to n+sod(n) for n = 45131298 and 45131307.

It is not an unprimeable number, because it can be changed into a prime (45131351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1074535 + ... + 1074576.

It is an arithmetic number, because the mean of its divisors is an integer number (8596448).

Almost surely, 2^45131331 is an apocalyptic number.

45131331 is a deficient number, since it is larger than the sum of its proper divisors (23640253).

45131331 is a wasteful number, since it uses less digits than its factorization.

45131331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2149121.

The product of its digits is 540, while the sum is 21.

The square root of 45131331 is about 6717.9856355905. The cubic root of 45131331 is about 356.0350168602.

Adding to 45131331 its reverse (13313154), we get a palindrome (58444485).

The spelling of 45131331 in words is "forty-five million, one hundred thirty-one thousand, three hundred thirty-one".