525221012 has 24 divisors (see below), whose sum is σ = 935879616. Its totient is φ = 257865728.

The previous prime is 525220991. The next prime is 525221017. The reversal of 525221012 is 210122525.

It is a happy number.

It is a super-2 number, since 2×525221012² = 551714222892608288, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (525221017) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50708 + ... + 60180.

It is an arithmetic number, because the mean of its divisors is an integer number (38994984).

Almost surely, 2^525221012 is an apocalyptic number.

It is an amenable number.

525221012 is a deficient number, since it is larger than the sum of its proper divisors (410658604).

525221012 is a wasteful number, since it uses less digits than its factorization.

525221012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9727 (or 9725 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 525221012 is about 22917.7008445437. The cubic root of 525221012 is about 806.8275093823.

Adding to 525221012 its reverse (210122525), we get a palindrome (735343537).

The spelling of 525221012 in words is "five hundred twenty-five million, two hundred twenty-one thousand, twelve".