45251993 has 2 divisors, whose sum is σ = 45251994. Its totient is φ = 45251992.

The previous prime is 45251989. The next prime is 45252013. The reversal of 45251993 is 39915254.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41822089 + 3429904 = 6467^2 + 1852^2 .

It is a cyclic number.

It is not a de Polignac number, because 45251993 - 2² = 45251989 is a prime.

It is a super-3 number, since 3×45251993³ (a number of 24 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (45251903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22625996 + 22625997.

It is an arithmetic number, because the mean of its divisors is an integer number (22625997).

Almost surely, 2^45251993 is an apocalyptic number.

It is an amenable number.

45251993 is a deficient number, since it is larger than the sum of its proper divisors (1).

45251993 is an equidigital number, since it uses as much as digits as its factorization.

45251993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48600, while the sum is 38.

The square root of 45251993 is about 6726.9601604291. The cubic root of 45251993 is about 356.3520299530.

The spelling of 45251993 in words is "forty-five million, two hundred fifty-one thousand, nine hundred ninety-three".