45215237 has 4 divisors (see below), whose sum is σ = 45242016. Its totient is φ = 45188460.

The previous prime is 45215227. The next prime is 45215273. The reversal of 45215237 is 73251254.

It is a happy number.

45215237 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, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 73251254 = 2 ⋅36625627.

It is a cyclic number.

It is not a de Polignac number, because 45215237 - 2¹⁶ = 45149701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45215207) 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, 10673 + ... + 14294.

It is an arithmetic number, because the mean of its divisors is an integer number (11310504).

Almost surely, 2^45215237 is an apocalyptic number.

It is an amenable number.

45215237 is a deficient number, since it is larger than the sum of its proper divisors (26779).

45215237 is a wasteful number, since it uses less digits than its factorization.

45215237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26778.

The product of its digits is 8400, while the sum is 29.

The square root of 45215237 is about 6724.2276136371. The cubic root of 45215237 is about 356.2555213261.

The spelling of 45215237 in words is "forty-five million, two hundred fifteen thousand, two hundred thirty-seven".