522997381 has 4 divisors (see below), whose sum is σ = 524211264. Its totient is φ = 521783500.

The previous prime is 522997361. The next prime is 522997393. The reversal of 522997381 is 183799225.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 522997381 - 2¹⁹ = 522473093 is a prime.

It is a super-2 number, since 2×522997381² = 547052521065718322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (522997361) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 606295 + ... + 607156.

It is an arithmetic number, because the mean of its divisors is an integer number (131052816).

Almost surely, 2^522997381 is an apocalyptic number.

It is an amenable number.

522997381 is a deficient number, since it is larger than the sum of its proper divisors (1213883).

522997381 is a wasteful number, since it uses less digits than its factorization.

522997381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1213882.

The product of its digits is 272160, while the sum is 46.

The square root of 522997381 is about 22869.1359915498. The cubic root of 522997381 is about 805.6872754169.

The spelling of 522997381 in words is "five hundred twenty-two million, nine hundred ninety-seven thousand, three hundred eighty-one".