2312781853 has 4 divisors (see below), whose sum is σ = 2315862208. Its totient is φ = 2309701500.

The previous prime is 2312781841. The next prime is 2312781869. The reversal of 2312781853 is 3581872132.

It is a happy number.

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 a de Polignac number, because none of the positive numbers 2^k-2312781853 is a prime.

It is a super-2 number, since 2×2312781853² = 10697919799132227218, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2312781883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1539051 + ... + 1540552.

It is an arithmetic number, because the mean of its divisors is an integer number (578965552).

Almost surely, 2^2312781853 is an apocalyptic number.

It is an amenable number.

2312781853 is a deficient number, since it is larger than the sum of its proper divisors (3080355).

2312781853 is an equidigital number, since it uses as much as digits as its factorization.

2312781853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3080354.

The product of its digits is 80640, while the sum is 40.

The square root of 2312781853 is about 48091.3906328357. The cubic root of 2312781853 is about 1322.4468414638.

The spelling of 2312781853 in words is "two billion, three hundred twelve million, seven hundred eighty-one thousand, eight hundred fifty-three".