521772242 has 8 divisors (see below), whose sum is σ = 782960256. Its totient is φ = 260785492.

The previous prime is 521772241. The next prime is 521772269. The reversal of 521772242 is 242277125.

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

It is a junction number, because it is equal to n+sod(n) for n = 521772199 and 521772208.

It is not an unprimeable number, because it can be changed into a prime (521772241) 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, 43658 + ... + 54309.

It is an arithmetic number, because the mean of its divisors is an integer number (97870032).

Almost surely, 2^521772242 is an apocalyptic number.

521772242 is a deficient number, since it is larger than the sum of its proper divisors (261188014).

521772242 is a wasteful number, since it uses less digits than its factorization.

521772242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100632.

The product of its digits is 15680, while the sum is 32.

The square root of 521772242 is about 22842.3344253603. The cubic root of 521772242 is about 805.0576669978.

The spelling of 521772242 in words is "five hundred twenty-one million, seven hundred seventy-two thousand, two hundred forty-two".