2342357781 has 4 divisors (see below), whose sum is σ = 3123143712. Its totient is φ = 1561571852.

The previous prime is 2342357747. The next prime is 2342357827. The reversal of 2342357781 is 1877532432.

It is a happy number.

2342357781 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 2342357781 - 2⁷ = 2342357653 is a prime.

It is a super-2 number, since 2×2342357781² = 10973279948422487922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2342352781) 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, 390392961 + ... + 390392966.

It is an arithmetic number, because the mean of its divisors is an integer number (780785928).

Almost surely, 2^2342357781 is an apocalyptic number.

It is an amenable number.

2342357781 is a deficient number, since it is larger than the sum of its proper divisors (780785931).

2342357781 is an equidigital number, since it uses as much as digits as its factorization.

2342357781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 780785930.

The product of its digits is 282240, while the sum is 42.

The square root of 2342357781 is about 48397.9109156583. The cubic root of 2342357781 is about 1328.0601454364.

The spelling of 2342357781 in words is "two billion, three hundred forty-two million, three hundred fifty-seven thousand, seven hundred eighty-one".