251420134426541 has 2 divisors, whose sum is σ = 251420134426542. Its totient is φ = 251420134426540.

The previous prime is 251420134426481. The next prime is 251420134426543. The reversal of 251420134426541 is 145624431024152.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 199296860500516 + 52123273926025 = 14117254^2 + 7219645^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-251420134426541 is a prime.

Together with 251420134426543, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 251420134426492 and 251420134426501.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (251420134426543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125710067213270 + 125710067213271.

It is an arithmetic number, because the mean of its divisors is an integer number (125710067213271).

Almost surely, 2^{251420134426541} is an apocalyptic number.

It is an amenable number.

251420134426541 is a deficient number, since it is larger than the sum of its proper divisors (1).

251420134426541 is an equidigital number, since it uses as much as digits as its factorization.

251420134426541 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 921600, while the sum is 44.

The spelling of 251420134426541 in words is "two hundred fifty-one trillion, four hundred twenty billion, one hundred thirty-four million, four hundred twenty-six thousand, five hundred forty-one".