6997431825 has 18 divisors (see below), whose sum is σ = 12533178294. Its totient is φ = 3731963520.

The previous prime is 6997431821. The next prime is 6997431937. The reversal of 6997431825 is 5281347996.

It can be written as a sum of positive squares in 3 ways, for example, as 2412381456 + 4585050369 = 49116^2 + 67713^2 .

It is not a de Polignac number, because 6997431825 - 2² = 6997431821 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6997431821) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 15549624 + ... + 15550073.

It is an arithmetic number, because the mean of its divisors is an integer number (696287683).

Almost surely, 2^6997431825 is an apocalyptic number.

It is an amenable number.

6997431825 is a deficient number, since it is larger than the sum of its proper divisors (5535746469).

6997431825 is a wasteful number, since it uses less digits than its factorization.

6997431825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31099713 (or 31099705 counting only the distinct ones).

The product of its digits is 3265920, while the sum is 54.

The square root of 6997431825 is about 83650.6534642737. The cubic root of 6997431825 is about 1912.6972140599.

The spelling of 6997431825 in words is "six billion, nine hundred ninety-seven million, four hundred thirty-one thousand, eight hundred twenty-five".