2261931 has 16 divisors (see below), whose sum is σ = 3628800. Its totient is φ = 1224288.

The previous prime is 2261927. The next prime is 2261933. The reversal of 2261931 is 1391622.

It is not a de Polignac number, because 2261931 - 2² = 2261927 is a prime.

It is a super-2 number, since 2×2261931² = 10232663697522, which contains 22 as substring.

2261931 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2261933) 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, 2436 + ... + 3233.

It is an arithmetic number, because the mean of its divisors is an integer number (226800).

2^2261931 is an apocalyptic number.

2261931 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2261931 is a deficient number, since it is larger than the sum of its proper divisors (1366869).

2261931 is a wasteful number, since it uses less digits than its factorization.

2261931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5698.

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

The square root of 2261931 is about 1503.9717417558. The cubic root of 2261931 is about 131.2682768199.

The spelling of 2261931 in words is "two million, two hundred sixty-one thousand, nine hundred thirty-one".