63955431 has 12 divisors (see below), whose sum is σ = 92467752. Its totient is φ = 42596496.

The previous prime is 63955427. The next prime is 63955439. The reversal of 63955431 is 13455936.

It is not a de Polignac number, because 63955431 - 2² = 63955427 is a prime.

It is a super-2 number, since 2×63955431² = 8180594308791522, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63955439) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9045 + ... + 14481.

It is an arithmetic number, because the mean of its divisors is an integer number (7705646).

Almost surely, 2^63955431 is an apocalyptic number.

63955431 is a deficient number, since it is larger than the sum of its proper divisors (28512321).

63955431 is a wasteful number, since it uses less digits than its factorization.

63955431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6750 (or 6747 counting only the distinct ones).

The product of its digits is 48600, while the sum is 36.

The square root of 63955431 is about 7997.2139523712. The cubic root of 63955431 is about 399.9071263546.

The spelling of 63955431 in words is "sixty-three million, nine hundred fifty-five thousand, four hundred thirty-one".