522015981 has 16 divisors (see below), whose sum is σ = 741740544. Its totient is φ = 325795184.

The previous prime is 522015959. The next prime is 522015997. The reversal of 522015981 is 189510225.

It is not a de Polignac number, because 522015981 - 2¹³ = 522007789 is a prime.

It is a super-2 number, since 2×522015981² = 545001368838784722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (522015181) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77241 + ... + 83726.

It is an arithmetic number, because the mean of its divisors is an integer number (46358784).

Almost surely, 2^522015981 is an apocalyptic number.

It is an amenable number.

522015981 is a deficient number, since it is larger than the sum of its proper divisors (219724563).

522015981 is a wasteful number, since it uses less digits than its factorization.

522015981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161040.

The product of its (nonzero) digits is 7200, while the sum is 33.

The square root of 522015981 is about 22847.6690495989. The cubic root of 522015981 is about 805.1830048294.

The spelling of 522015981 in words is "five hundred twenty-two million, fifteen thousand, nine hundred eighty-one".