2231890 has 16 divisors (see below), whose sum is σ = 4036032. Its totient is φ = 888624.

The previous prime is 2231881. The next prime is 2231891. The reversal of 2231890 is 981322.

It is a super-3 number, since 3×2231890³ = 33353361741300807000, which contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (2231891) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2707 + ... + 3433.

It is an arithmetic number, because the mean of its divisors is an integer number (252252).

2^2231890 is an apocalyptic number.

2231890 is a deficient number, since it is larger than the sum of its proper divisors (1804142).

2231890 is a wasteful number, since it uses less digits than its factorization.

2231890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1041.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 2231890 is about 1493.9511370858. The cubic root of 2231890 is about 130.6845546222.

The spelling of 2231890 in words is "two million, two hundred thirty-one thousand, eight hundred ninety".