45312251 has 2 divisors, whose sum is σ = 45312252. Its totient is φ = 45312250.

The previous prime is 45312247. The next prime is 45312299. The reversal of 45312251 is 15221354.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 45312251 - 2² = 45312247 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (45312221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22656125 + 22656126.

It is an arithmetic number, because the mean of its divisors is an integer number (22656126).

Almost surely, 2^45312251 is an apocalyptic number.

45312251 is a deficient number, since it is larger than the sum of its proper divisors (1).

45312251 is an equidigital number, since it uses as much as digits as its factorization.

45312251 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1200, while the sum is 23.

The square root of 45312251 is about 6731.4375136370. The cubic root of 45312251 is about 356.5101337550.

The spelling of 45312251 in words is "forty-five million, three hundred twelve thousand, two hundred fifty-one".