65631042 has 24 divisors (see below), whose sum is σ = 142511616. Its totient is φ = 21829176.

The previous prime is 65631023. The next prime is 65631043. The reversal of 65631042 is 24013656.

65631042 is a `hidden beast` number, since 656 + 3 + 1 + 0 + 4 + 2 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 65630997 and 65631015.

It is not an unprimeable number, because it can be changed into a prime (65631043) 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, 5023 + ... + 12509.

It is an arithmetic number, because the mean of its divisors is an integer number (5937984).

Almost surely, 2^65631042 is an apocalyptic number.

65631042 is an abundant number, since it is smaller than the sum of its proper divisors (76880574).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65631042 is a wasteful number, since it uses less digits than its factorization.

65631042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7982 (or 7979 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 65631042 is about 8101.2987847628. The cubic root of 65631042 is about 403.3695399655.

Adding to 65631042 its reverse (24013656), we get a palindrome (89644698).

The spelling of 65631042 in words is "sixty-five million, six hundred thirty-one thousand, forty-two".