445440253 has 2 divisors, whose sum is σ = 445440254. Its totient is φ = 445440252.

The previous prime is 445440221. The next prime is 445440263. The reversal of 445440253 is 352044544.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 428572804 + 16867449 = 20702^2 + 4107^2 .

It is a cyclic number.

It is not a de Polignac number, because 445440253 - 2⁵ = 445440221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (445440263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222720126 + 222720127.

It is an arithmetic number, because the mean of its divisors is an integer number (222720127).

Almost surely, 2^445440253 is an apocalyptic number.

It is an amenable number.

445440253 is a deficient number, since it is larger than the sum of its proper divisors (1).

445440253 is an equidigital number, since it uses as much as digits as its factorization.

445440253 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 38400, while the sum is 31.

The square root of 445440253 is about 21105.4555269485. The cubic root of 445440253 is about 763.7123613393.

Adding to 445440253 its reverse (352044544), we get a palindrome (797484797).

The spelling of 445440253 in words is "four hundred forty-five million, four hundred forty thousand, two hundred fifty-three".