63131291 has 4 divisors (see below), whose sum is σ = 63152784. Its totient is φ = 63109800.

The previous prime is 63131249. The next prime is 63131303. The reversal of 63131291 is 19213136.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 63131291 - 2²² = 58936987 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 63131291.

It is not an unprimeable number, because it can be changed into a prime (63131491) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5480 + ... + 12501.

It is an arithmetic number, because the mean of its divisors is an integer number (15788196).

Almost surely, 2^63131291 is an apocalyptic number.

63131291 is a deficient number, since it is larger than the sum of its proper divisors (21493).

63131291 is a wasteful number, since it uses less digits than its factorization.

63131291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21492.

The product of its digits is 972, while the sum is 26.

The square root of 63131291 is about 7945.5201843555. The cubic root of 63131291 is about 398.1819387359.

The spelling of 63131291 in words is "sixty-three million, one hundred thirty-one thousand, two hundred ninety-one".