251144142439 has 2 divisors, whose sum is σ = 251144142440. Its totient is φ = 251144142438.

The previous prime is 251144142413. The next prime is 251144142493. The reversal of 251144142439 is 934241441152.

It is a happy number.

Together with next prime (251144142493) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 251144142439 - 2³⁵ = 216784404071 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (251144152439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125572071219 + 125572071220.

It is an arithmetic number, because the mean of its divisors is an integer number (125572071220).

Almost surely, 2^251144142439 is an apocalyptic number.

251144142439 is a deficient number, since it is larger than the sum of its proper divisors (1).

251144142439 is an equidigital number, since it uses as much as digits as its factorization.

251144142439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 138240, while the sum is 40.

The spelling of 251144142439 in words is "two hundred fifty-one billion, one hundred forty-four million, one hundred forty-two thousand, four hundred thirty-nine".