641463131 has 4 divisors (see below), whose sum is σ = 643486992. Its totient is φ = 639439272.

The previous prime is 641463127. The next prime is 641463133. The reversal of 641463131 is 131364146.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 131364146 = 2 ⋅65682073.

It is a cyclic number.

It is not a de Polignac number, because 641463131 - 2² = 641463127 is a prime.

It is a super-2 number, since 2×641463131² = 822949896864646322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 641463094 and 641463103.

It is not an unprimeable number, because it can be changed into a prime (641463133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1011455 + ... + 1012088.

It is an arithmetic number, because the mean of its divisors is an integer number (160871748).

Almost surely, 2^641463131 is an apocalyptic number.

641463131 is a deficient number, since it is larger than the sum of its proper divisors (2023861).

641463131 is a wasteful number, since it uses less digits than its factorization.

641463131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2023860.

The product of its digits is 5184, while the sum is 29.

The square root of 641463131 is about 25327.1224382084. The cubic root of 641463131 is about 862.4300887393.

The spelling of 641463131 in words is "six hundred forty-one million, four hundred sixty-three thousand, one hundred thirty-one".