521433442 has 8 divisors (see below), whose sum is σ = 782682732. Its totient is φ = 260539200.

The previous prime is 521433439. The next prime is 521433527. The reversal of 521433442 is 244334125.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 517517001 + 3916441 = 22749^2 + 1979^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 521433442.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85059 + ... + 90982.

Almost surely, 2^521433442 is an apocalyptic number.

521433442 is a deficient number, since it is larger than the sum of its proper divisors (261249290).

521433442 is a wasteful number, since it uses less digits than its factorization.

521433442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177524.

The product of its digits is 11520, while the sum is 28.

The square root of 521433442 is about 22834.9171664799. The cubic root of 521433442 is about 804.8833811235.

Adding to 521433442 its reverse (244334125), we get a palindrome (765767567).

The spelling of 521433442 in words is "five hundred twenty-one million, four hundred thirty-three thousand, four hundred forty-two".