2231404021 has 16 divisors (see below), whose sum is σ = 2783848320. Its totient is φ = 1737607680.

The previous prime is 2231403991. The next prime is 2231404027. The reversal of 2231404021 is 1204041322.

It is a cyclic number.

It is not a de Polignac number, because 2231404021 - 2²⁷ = 2097186293 is a prime.

It is a super-3 number, since 3×2231404021³ (a number of 29 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2231404021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2231404027) 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, 118845 + ... + 136333.

It is an arithmetic number, because the mean of its divisors is an integer number (173990520).

Almost surely, 2^2231404021 is an apocalyptic number.

It is an amenable number.

2231404021 is a deficient number, since it is larger than the sum of its proper divisors (552444299).

2231404021 is a wasteful number, since it uses less digits than its factorization.

2231404021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19164.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 2231404021 is about 47237.7393722435. The cubic root of 2231404021 is about 1306.7506870677.

Adding to 2231404021 its reverse (1204041322), we get a palindrome (3435445343).

The spelling of 2231404021 in words is "two billion, two hundred thirty-one million, four hundred four thousand, twenty-one".