45031215 has 32 divisors (see below), whose sum is σ = 76904640. Its totient is φ = 22421504.

The previous prime is 45031213. The next prime is 45031223. The reversal of 45031215 is 51213054.

It is not a de Polignac number, because 45031215 - 2¹ = 45031213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 45031191 and 45031200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45031213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 34291 + ... + 35579.

It is an arithmetic number, because the mean of its divisors is an integer number (2403270).

Almost surely, 2^45031215 is an apocalyptic number.

45031215 is a deficient number, since it is larger than the sum of its proper divisors (31873425).

45031215 is a wasteful number, since it uses less digits than its factorization.

45031215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1451.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 45031215 is about 6710.5301578936. The cubic root of 45031215 is about 355.7715547173.

Adding to 45031215 its reverse (51213054), we get a palindrome (96244269).

The spelling of 45031215 in words is "forty-five million, thirty-one thousand, two hundred fifteen".