6921400431 has 16 divisors (see below), whose sum is σ = 10072846080. Its totient is φ = 4192557120.

The previous prime is 6921400429. The next prime is 6921400463. The reversal of 6921400431 is 1340041296.

It is not a de Polignac number, because 6921400431 - 2¹ = 6921400429 is a prime.

It is a super-2 number, since 2×6921400431² = 95811567852493971522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6921400471) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8310 + ... + 117948.

It is an arithmetic number, because the mean of its divisors is an integer number (629552880).

Almost surely, 2^6921400431 is an apocalyptic number.

6921400431 is a deficient number, since it is larger than the sum of its proper divisors (3151445649).

6921400431 is a wasteful number, since it uses less digits than its factorization.

6921400431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111566.

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 6921400431 is about 83194.9543602255. The cubic root of 6921400431 is about 1905.7444275430.

The spelling of 6921400431 in words is "six billion, nine hundred twenty-one million, four hundred thousand, four hundred thirty-one".