45421215 has 32 divisors (see below), whose sum is σ = 83897856. Its totient is φ = 20553600.

The previous prime is 45421213. The next prime is 45421219. The reversal of 45421215 is 51212454.

It is not a de Polignac number, because 45421215 - 2¹ = 45421213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45421213) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8464 + ... + 12746.

It is an arithmetic number, because the mean of its divisors is an integer number (2621808).

Almost surely, 2^45421215 is an apocalyptic number.

45421215 is a deficient number, since it is larger than the sum of its proper divisors (38476641).

45421215 is a wasteful number, since it uses less digits than its factorization.

45421215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4399.

The product of its digits is 1600, while the sum is 24.

The square root of 45421215 is about 6739.5263186666. The cubic root of 45421215 is about 356.7956759071.

Adding to 45421215 its reverse (51212454), we get a palindrome (96633669).

The spelling of 45421215 in words is "forty-five million, four hundred twenty-one thousand, two hundred fifteen".