2231131402 has 16 divisors (see below), whose sum is σ = 3366731232. Its totient is φ = 1108907280.

The previous prime is 2231131387. The next prime is 2231131421. The reversal of 2231131402 is 2041311322.

It is a happy number.

It is a super-3 number, since 3×2231131402³ (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 2231131402.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 240877 + ... + 249967.

It is an arithmetic number, because the mean of its divisors is an integer number (210420702).

Almost surely, 2^2231131402 is an apocalyptic number.

2231131402 is a deficient number, since it is larger than the sum of its proper divisors (1135599830).

2231131402 is a wasteful number, since it uses less digits than its factorization.

2231131402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9813.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 2231131402 is about 47234.8536781898. The cubic root of 2231131402 is about 1306.6974680225.

Adding to 2231131402 its reverse (2041311322), we get a palindrome (4272442724).

The spelling of 2231131402 in words is "two billion, two hundred thirty-one million, one hundred thirty-one thousand, four hundred two".