501273892381 has 2 divisors, whose sum is σ = 501273892382. Its totient is φ = 501273892380.

The previous prime is 501273892363. The next prime is 501273892387. The reversal of 501273892381 is 183298372105.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 460892989881 + 40380902500 = 678891^2 + 200950^2 .

It is a cyclic number.

It is not a de Polignac number, because 501273892381 - 2⁹ = 501273891869 is a prime.

It is a super-2 number, since 2×501273892381² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (501273892387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 250636946190 + 250636946191.

It is an arithmetic number, because the mean of its divisors is an integer number (250636946191).

Almost surely, 2^501273892381 is an apocalyptic number.

It is an amenable number.

501273892381 is a deficient number, since it is larger than the sum of its proper divisors (1).

501273892381 is an equidigital number, since it uses as much as digits as its factorization.

501273892381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 725760, while the sum is 49.

The spelling of 501273892381 in words is "five hundred one billion, two hundred seventy-three million, eight hundred ninety-two thousand, three hundred eighty-one".