521131332 has 24 divisors (see below), whose sum is σ = 1268842176. Its totient is φ = 166157728.

The previous prime is 521131291. The next prime is 521131339. The reversal of 521131332 is 233131125.

It is a junction number, because it is equal to n+sod(n) for n = 521131299 and 521131308.

It is not an unprimeable number, because it can be changed into a prime (521131339) 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, 943803 + ... + 944354.

It is an arithmetic number, because the mean of its divisors is an integer number (52868424).

Almost surely, 2^521131332 is an apocalyptic number.

It is an amenable number.

521131332 is an abundant number, since it is smaller than the sum of its proper divisors (747710844).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

521131332 is a wasteful number, since it uses less digits than its factorization.

521131332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1888187 (or 1888185 counting only the distinct ones).

The product of its digits is 540, while the sum is 21.

The square root of 521131332 is about 22828.3011194438. The cubic root of 521131332 is about 804.7279056749.

Adding to 521131332 its reverse (233131125), we get a palindrome (754262457).

The spelling of 521131332 in words is "five hundred twenty-one million, one hundred thirty-one thousand, three hundred thirty-two".