1251423222523 has 2 divisors, whose sum is σ = 1251423222524. Its totient is φ = 1251423222522.

The previous prime is 1251423222449. The next prime is 1251423222551. The reversal of 1251423222523 is 3252223241521.

It is a strong prime.

It is an emirp because it is prime and its reverse (3252223241521) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1251423222523 is a prime.

It is not a weakly prime, because it can be changed into another prime (1251423222923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 625711611261 + 625711611262.

It is an arithmetic number, because the mean of its divisors is an integer number (625711611262).

Almost surely, 2^{1251423222523} is an apocalyptic number.

1251423222523 is a deficient number, since it is larger than the sum of its proper divisors (1).

1251423222523 is an equidigital number, since it uses as much as digits as its factorization.

1251423222523 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 57600, while the sum is 34.

The spelling of 1251423222523 in words is "one trillion, two hundred fifty-one billion, four hundred twenty-three million, two hundred twenty-two thousand, five hundred twenty-three".