63445431 has 16 divisors (see below), whose sum is σ = 100882944. Its totient is φ = 34677984.

The previous prime is 63445423. The next prime is 63445433. The reversal of 63445431 is 13454436.

It is not a de Polignac number, because 63445431 - 2³ = 63445423 is a prime.

It is a super-2 number, since 2×63445431² = 8050645429551522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63445433) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65196 + ... + 66161.

It is an arithmetic number, because the mean of its divisors is an integer number (6305184).

Almost surely, 2^63445431 is an apocalyptic number.

63445431 is a deficient number, since it is larger than the sum of its proper divisors (37437513).

63445431 is a wasteful number, since it uses less digits than its factorization.

63445431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131390.

The product of its digits is 17280, while the sum is 30.

The square root of 63445431 is about 7965.2640257558. The cubic root of 63445431 is about 398.8412946625.

Adding to 63445431 its reverse (13454436), we get a palindrome (76899867).

The spelling of 63445431 in words is "sixty-three million, four hundred forty-five thousand, four hundred thirty-one".