251233121353 has 2 divisors, whose sum is σ = 251233121354. Its totient is φ = 251233121352.

The previous prime is 251233121339. The next prime is 251233121383. The reversal of 251233121353 is 353121332152.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 158063495184 + 93169626169 = 397572^2 + 305237^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-251233121353 is a prime.

It is not a weakly prime, because it can be changed into another prime (251233121303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125616560676 + 125616560677.

It is an arithmetic number, because the mean of its divisors is an integer number (125616560677).

Almost surely, 2^251233121353 is an apocalyptic number.

It is an amenable number.

251233121353 is a deficient number, since it is larger than the sum of its proper divisors (1).

251233121353 is an equidigital number, since it uses as much as digits as its factorization.

251233121353 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16200, while the sum is 31.

The spelling of 251233121353 in words is "two hundred fifty-one billion, two hundred thirty-three million, one hundred twenty-one thousand, three hundred fifty-three".