245631128251 has 2 divisors, whose sum is σ = 245631128252. Its totient is φ = 245631128250.

The previous prime is 245631128219. The next prime is 245631128257. The reversal of 245631128251 is 152821136542.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 245631128251 - 2⁵ = 245631128219 is a prime.

It is not a weakly prime, because it can be changed into another prime (245631128257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122815564125 + 122815564126.

It is an arithmetic number, because the mean of its divisors is an integer number (122815564126).

Almost surely, 2^245631128251 is an apocalyptic number.

245631128251 is a deficient number, since it is larger than the sum of its proper divisors (1).

245631128251 is an equidigital number, since it uses as much as digits as its factorization.

245631128251 is an evil number, because the sum of its binary digits is even.

The product of its digits is 115200, while the sum is 40.

The spelling of 245631128251 in words is "two hundred forty-five billion, six hundred thirty-one million, one hundred twenty-eight thousand, two hundred fifty-one".