245504221139 has 2 divisors, whose sum is σ = 245504221140. Its totient is φ = 245504221138.

The previous prime is 245504221097. The next prime is 245504221147. The reversal of 245504221139 is 931122405542.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 245504221139 - 2³⁶ = 176784744403 is a prime.

It is not a weakly prime, because it can be changed into another prime (245504221159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122752110569 + 122752110570.

It is an arithmetic number, because the mean of its divisors is an integer number (122752110570).

Almost surely, 2^245504221139 is an apocalyptic number.

245504221139 is a deficient number, since it is larger than the sum of its proper divisors (1).

245504221139 is an equidigital number, since it uses as much as digits as its factorization.

245504221139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 86400, while the sum is 38.

The spelling of 245504221139 in words is "two hundred forty-five billion, five hundred four million, two hundred twenty-one thousand, one hundred thirty-nine".