2231961 has 4 divisors (see below), whose sum is σ = 2975952. Its totient is φ = 1487972.

The previous prime is 2231941. The next prime is 2232017. The reversal of 2231961 is 1691322.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2231961 - 2⁷ = 2231833 is a prime.

It is a super-3 number, since 3×2231961³ = 33356544914329670043, which contains 333 as substring.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (2231941) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 371991 + ... + 371996.

It is an arithmetic number, because the mean of its divisors is an integer number (743988).

2^2231961 is an apocalyptic number.

It is an amenable number.

2231961 is a deficient number, since it is larger than the sum of its proper divisors (743991).

2231961 is an equidigital number, since it uses as much as digits as its factorization.

2231961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 743990.

The product of its digits is 648, while the sum is 24.

The square root of 2231961 is about 1493.9748993875. The cubic root of 2231961 is about 130.6859403693.

The spelling of 2231961 in words is "two million, two hundred thirty-one thousand, nine hundred sixty-one".