6431213240 has 32 divisors (see below), whose sum is σ = 14497025760. Its totient is φ = 2567721600.

The previous prime is 6431213213. The next prime is 6431213267. The reversal of 6431213240 is 423121346.

It is an interprime number because it is at equal distance from previous prime (6431213213) and next prime (6431213267).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 126956 + ... + 170235.

It is an arithmetic number, because the mean of its divisors is an integer number (453032055).

Almost surely, 2^6431213240 is an apocalyptic number.

It is an amenable number.

6431213240 is an abundant number, since it is smaller than the sum of its proper divisors (8065812520).

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

6431213240 is a wasteful number, since it uses less digits than its factorization.

6431213240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297743 (or 297739 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 6431213240 is about 80194.8454702670. The cubic root of 6431213240 is about 1859.6489529037.

Adding to 6431213240 its reverse (423121346), we get a palindrome (6854334586).

The spelling of 6431213240 in words is "six billion, four hundred thirty-one million, two hundred thirteen thousand, two hundred forty".