521140433 has 8 divisors (see below), whose sum is σ = 569442720. Its totient is φ = 472992480.

The previous prime is 521140429. The next prime is 521140439. The reversal of 521140433 is 334041125.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 521140433 - 2² = 521140429 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 521140399 and 521140408.

It is not an unprimeable number, because it can be changed into a prime (521140439) 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, 31460 + ... + 45077.

It is an arithmetic number, because the mean of its divisors is an integer number (71180340).

Almost surely, 2^521140433 is an apocalyptic number.

It is an amenable number.

521140433 is a deficient number, since it is larger than the sum of its proper divisors (48302287).

521140433 is a wasteful number, since it uses less digits than its factorization.

521140433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77167.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 521140433 is about 22828.5004544758. The cubic root of 521140433 is about 804.7325902176.

Adding to 521140433 its reverse (334041125), we get a palindrome (855181558).

The spelling of 521140433 in words is "five hundred twenty-one million, one hundred forty thousand, four hundred thirty-three".