2331699981 has 16 divisors (see below), whose sum is σ = 3349644480. Its totient is φ = 1434222720.

The previous prime is 2331699973. The next prime is 2331700027. The reversal of 2331699981 is 1899961332.

It is a happy number.

It is not a de Polignac number, because 2331699981 - 2³ = 2331699973 is a prime.

It is a super-2 number, since 2×2331699981² = 10873649602790800722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2331699941) 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, 78441 + ... + 104001.

It is an arithmetic number, because the mean of its divisors is an integer number (209352780).

Almost surely, 2^2331699981 is an apocalyptic number.

It is an amenable number.

2331699981 is a deficient number, since it is larger than the sum of its proper divisors (1017944499).

2331699981 is a wasteful number, since it uses less digits than its factorization.

2331699981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27916.

The product of its digits is 629856, while the sum is 51.

The square root of 2331699981 is about 48287.6793913313. The cubic root of 2331699981 is about 1326.0428445625.

The spelling of 2331699981 in words is "two billion, three hundred thirty-one million, six hundred ninety-nine thousand, nine hundred eighty-one".