641431715 has 8 divisors (see below), whose sum is σ = 796260240. Its totient is φ = 495450592.

The previous prime is 641431699. The next prime is 641431717. The reversal of 641431715 is 517134146.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 641431715 - 2⁴ = 641431699 is a prime.

It is a super-2 number, since 2×641431715² = 822869290015682450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (641431717) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2211689 + ... + 2211978.

It is an arithmetic number, because the mean of its divisors is an integer number (99532530).

Almost surely, 2^641431715 is an apocalyptic number.

641431715 is a deficient number, since it is larger than the sum of its proper divisors (154828525).

641431715 is a wasteful number, since it uses less digits than its factorization.

641431715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4423701.

The product of its digits is 10080, while the sum is 32.

The square root of 641431715 is about 25326.5022259293. The cubic root of 641431715 is about 862.4160091845.

The spelling of 641431715 in words is "six hundred forty-one million, four hundred thirty-one thousand, seven hundred fifteen".