2220231997 has 16 divisors (see below), whose sum is σ = 2331044352. Its totient is φ = 2112010560.

The previous prime is 2220231991. The next prime is 2220232051. The reversal of 2220231997 is 7991320222.

It is a cyclic number.

It is not a de Polignac number, because 2220231997 - 2⁷ = 2220231869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2220231991) 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, 1355463 + ... + 1357099.

It is an arithmetic number, because the mean of its divisors is an integer number (145690272).

Almost surely, 2^2220231997 is an apocalyptic number.

It is an amenable number.

2220231997 is a deficient number, since it is larger than the sum of its proper divisors (110812355).

2220231997 is a wasteful number, since it uses less digits than its factorization.

2220231997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2388.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 2220231997 is about 47119.3378242946. The cubic root of 2220231997 is about 1304.5661906148.

The spelling of 2220231997 in words is "two billion, two hundred twenty million, two hundred thirty-one thousand, nine hundred ninety-seven".