252400019 has 2 divisors, whose sum is σ = 252400020. Its totient is φ = 252400018.

The previous prime is 252399997. The next prime is 252400039. The reversal of 252400019 is 910004252.

252400019 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-252400019 is a prime.

It is a super-2 number, since 2×252400019² = 127411539182400722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 252399967 and 252400003.

It is not a weakly prime, because it can be changed into another prime (252400039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126200009 + 126200010.

It is an arithmetic number, because the mean of its divisors is an integer number (126200010).

Almost surely, 2^252400019 is an apocalyptic number.

252400019 is a deficient number, since it is larger than the sum of its proper divisors (1).

252400019 is an equidigital number, since it uses as much as digits as its factorization.

252400019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 252400019 is about 15887.1022845577. The cubic root of 252400019 is about 631.9699978748.

The spelling of 252400019 in words is "two hundred fifty-two million, four hundred thousand, nineteen".