535398229981 has 2 divisors, whose sum is σ = 535398229982. Its totient is φ = 535398229980.

The previous prime is 535398229969. The next prime is 535398229991. The reversal of 535398229981 is 189922893535.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 315545086756 + 219853143225 = 561734^2 + 468885^2 .

It is a cyclic number.

It is not a de Polignac number, because 535398229981 - 2¹⁹ = 535397705693 is a prime.

It is a super-2 number, since 2×535398229981² (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 (535398229991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 267699114990 + 267699114991.

It is an arithmetic number, because the mean of its divisors is an integer number (267699114991).

Almost surely, 2^535398229981 is an apocalyptic number.

It is an amenable number.

535398229981 is a deficient number, since it is larger than the sum of its proper divisors (1).

535398229981 is an equidigital number, since it uses as much as digits as its factorization.

535398229981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41990400, while the sum is 64.

The spelling of 535398229981 in words is "five hundred thirty-five billion, three hundred ninety-eight million, two hundred twenty-nine thousand, nine hundred eighty-one".