45213131 has 2 divisors, whose sum is σ = 45213132. Its totient is φ = 45213130.

The previous prime is 45213127. The next prime is 45213137. The reversal of 45213131 is 13131254.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 45213131 - 2² = 45213127 is a prime.

It is a super-2 number, since 2×45213131² = 4088454429646322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (45213137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22606565 + 22606566.

It is an arithmetic number, because the mean of its divisors is an integer number (22606566).

Almost surely, 2^45213131 is an apocalyptic number.

45213131 is a deficient number, since it is larger than the sum of its proper divisors (1).

45213131 is an equidigital number, since it uses as much as digits as its factorization.

45213131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 360, while the sum is 20.

The square root of 45213131 is about 6724.0710139022. The cubic root of 45213131 is about 356.2499901098.

Adding to 45213131 its reverse (13131254), we get a palindrome (58344385).

The spelling of 45213131 in words is "forty-five million, two hundred thirteen thousand, one hundred thirty-one".