45661213 has 4 divisors (see below), whose sum is σ = 49173628. Its totient is φ = 42148800.

The previous prime is 45661181. The next prime is 45661241. The reversal of 45661213 is 31216654.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13704804 + 31956409 = 3702^2 + 5653^2 .

It is a cyclic number.

It is not a de Polignac number, because 45661213 - 2⁵ = 45661181 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 (45661513) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1756188 + ... + 1756213.

It is an arithmetic number, because the mean of its divisors is an integer number (12293407).

Almost surely, 2^45661213 is an apocalyptic number.

It is an amenable number.

45661213 is a deficient number, since it is larger than the sum of its proper divisors (3512415).

45661213 is a wasteful number, since it uses less digits than its factorization.

45661213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3512414.

The product of its digits is 4320, while the sum is 28.

The square root of 45661213 is about 6757.3081178824. The cubic root of 45661213 is about 357.4229882854.

Adding to 45661213 its reverse (31216654), we get a palindrome (76877867).

The spelling of 45661213 in words is "forty-five million, six hundred sixty-one thousand, two hundred thirteen".