641035431 has 32 divisors (see below), whose sum is σ = 972998400. Its totient is φ = 416988000.

The previous prime is 641035429. The next prime is 641035441. The reversal of 641035431 is 134530146.

It is not a de Polignac number, because 641035431 - 2¹ = 641035429 is a prime.

It is a super-2 number, since 2×641035431² = 821852847594711522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 641035395 and 641035404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641035441) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 195556 + ... + 198806.

It is an arithmetic number, because the mean of its divisors is an integer number (30406200).

Almost surely, 2^641035431 is an apocalyptic number.

641035431 is a deficient number, since it is larger than the sum of its proper divisors (331962969).

641035431 is a wasteful number, since it uses less digits than its factorization.

641035431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3436 (or 3430 counting only the distinct ones).

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

The square root of 641035431 is about 25318.6775128560. The cubic root of 641035431 is about 862.2383690380.

Adding to 641035431 its reverse (134530146), we get a palindrome (775565577).

The spelling of 641035431 in words is "six hundred forty-one million, thirty-five thousand, four hundred thirty-one".