521051222 has 4 divisors (see below), whose sum is σ = 781576836. Its totient is φ = 260525610.

The previous prime is 521051191. The next prime is 521051233. The reversal of 521051222 is 222150125.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 521051194 and 521051203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130262804 + ... + 130262807.

It is an arithmetic number, because the mean of its divisors is an integer number (195394209).

Almost surely, 2^521051222 is an apocalyptic number.

521051222 is a deficient number, since it is larger than the sum of its proper divisors (260525614).

521051222 is a wasteful number, since it uses less digits than its factorization.

521051222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260525613.

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

The square root of 521051222 is about 22826.5464317316. The cubic root of 521051222 is about 804.6866684331.

The spelling of 521051222 in words is "five hundred twenty-one million, fifty-one thousand, two hundred twenty-two".