501455253281 has 2 divisors, whose sum is σ = 501455253282. Its totient is φ = 501455253280.

The previous prime is 501455253227. The next prime is 501455253301. The reversal of 501455253281 is 182352554105.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 499962126400 + 1493126881 = 707080^2 + 38641^2 .

It is a cyclic number.

It is not a de Polignac number, because 501455253281 - 2⁶ = 501455253217 is a prime.

It is a super-2 number, since 2×501455253281² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (501455253881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 250727626640 + 250727626641.

It is an arithmetic number, because the mean of its divisors is an integer number (250727626641).

Almost surely, 2^501455253281 is an apocalyptic number.

It is an amenable number.

501455253281 is a deficient number, since it is larger than the sum of its proper divisors (1).

501455253281 is an equidigital number, since it uses as much as digits as its factorization.

501455253281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 240000, while the sum is 41.

The spelling of 501455253281 in words is "five hundred one billion, four hundred fifty-five million, two hundred fifty-three thousand, two hundred eighty-one".