3121562243 has 2 divisors, whose sum is σ = 3121562244. Its totient is φ = 3121562242.

The previous prime is 3121562221. The next prime is 3121562261. The reversal of 3121562243 is 3422651213.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3121562243 - 2¹⁴ = 3121545859 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (3121562263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1560781121 + 1560781122.

It is an arithmetic number, because the mean of its divisors is an integer number (1560781122).

Almost surely, 2^3121562243 is an apocalyptic number.

3121562243 is a deficient number, since it is larger than the sum of its proper divisors (1).

3121562243 is an equidigital number, since it uses as much as digits as its factorization.

3121562243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8640, while the sum is 29.

The square root of 3121562243 is about 55870.9427430753. The cubic root of 3121562243 is about 1461.4725624006.

The spelling of 3121562243 in words is "three billion, one hundred twenty-one million, five hundred sixty-two thousand, two hundred forty-three".