52501221247 has 2 divisors, whose sum is σ = 52501221248. Its totient is φ = 52501221246.

The previous prime is 52501221209. The next prime is 52501221277. The reversal of 52501221247 is 74212210525.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-52501221247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (52501221277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26250610623 + 26250610624.

It is an arithmetic number, because the mean of its divisors is an integer number (26250610624).

Almost surely, 2^52501221247 is an apocalyptic number.

52501221247 is a deficient number, since it is larger than the sum of its proper divisors (1).

52501221247 is an equidigital number, since it uses as much as digits as its factorization.

52501221247 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11200, while the sum is 31.

The spelling of 52501221247 in words is "fifty-two billion, five hundred one million, two hundred twenty-one thousand, two hundred forty-seven".