251342161620331 has 2 divisors, whose sum is σ = 251342161620332. Its totient is φ = 251342161620330.

The previous prime is 251342161620233. The next prime is 251342161620371. The reversal of 251342161620331 is 133026161243152.

It is an a-pointer prime, because the next prime (251342161620371) can be obtained adding 251342161620331 to its sum of digits (40).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 251342161620331 - 2¹¹ = 251342161618283 is a prime.

It is a super-2 number, since 2×251342161620331² (a number of 30 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (251342161620371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125671080810165 + 125671080810166.

It is an arithmetic number, because the mean of its divisors is an integer number (125671080810166).

Almost surely, 2^{251342161620331} is an apocalyptic number.

251342161620331 is a deficient number, since it is larger than the sum of its proper divisors (1).

251342161620331 is an equidigital number, since it uses as much as digits as its factorization.

251342161620331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 155520, while the sum is 40.

The spelling of 251342161620331 in words is "two hundred fifty-one trillion, three hundred forty-two billion, one hundred sixty-one million, six hundred twenty thousand, three hundred thirty-one".