45311215 has 4 divisors (see below), whose sum is σ = 54373464. Its totient is φ = 36248968.

The previous prime is 45311209. The next prime is 45311251. The reversal of 45311215 is 51211354.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 51211354 = 2 ⋅25605677.

It is a cyclic number.

It is not a de Polignac number, because 45311215 - 2⁷ = 45311087 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4531117 + ... + 4531126.

It is an arithmetic number, because the mean of its divisors is an integer number (13593366).

Almost surely, 2^45311215 is an apocalyptic number.

45311215 is a deficient number, since it is larger than the sum of its proper divisors (9062249).

45311215 is an equidigital number, since it uses as much as digits as its factorization.

45311215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9062248.

The product of its digits is 600, while the sum is 22.

The square root of 45311215 is about 6731.3605608376. The cubic root of 45311215 is about 356.5074167024.

Adding to 45311215 its reverse (51211354), we get a palindrome (96522569).

The spelling of 45311215 in words is "forty-five million, three hundred eleven thousand, two hundred fifteen".