2523347861 has 4 divisors (see below), whose sum is σ = 2570958252. Its totient is φ = 2475737472.

The previous prime is 2523347851. The next prime is 2523347909. The reversal of 2523347861 is 1687433252.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1915725361 + 607622500 = 43769^2 + 24650^2 .

It is a cyclic number.

It is not a de Polignac number, because 2523347861 - 2¹⁴ = 2523331477 is a prime.

It is a super-2 number, since 2×2523347861² = 12734568855226550642, 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 (2523347821) 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, 23805116 + ... + 23805221.

It is an arithmetic number, because the mean of its divisors is an integer number (642739563).

Almost surely, 2^2523347861 is an apocalyptic number.

It is an amenable number.

2523347861 is a deficient number, since it is larger than the sum of its proper divisors (47610391).

2523347861 is an equidigital number, since it uses as much as digits as its factorization.

2523347861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47610390.

The product of its digits is 241920, while the sum is 41.

The square root of 2523347861 is about 50232.9360181146. The cubic root of 2523347861 is about 1361.4207796611.

The spelling of 2523347861 in words is "two billion, five hundred twenty-three million, three hundred forty-seven thousand, eight hundred sixty-one".