534507221 has 4 divisors (see below), whose sum is σ = 562639200. Its totient is φ = 506375244.

The previous prime is 534507209. The next prime is 534507223. The reversal of 534507221 is 122705435.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 122705435 = 5 ⋅24541087.

It is a cyclic number.

It is not a de Polignac number, because 534507221 - 2¹⁴ = 534490837 is a prime.

It is a super-2 number, since 2×534507221² = 571395938602285682, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (534507223) 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, 14065961 + ... + 14065998.

It is an arithmetic number, because the mean of its divisors is an integer number (140659800).

Almost surely, 2^534507221 is an apocalyptic number.

It is an amenable number.

534507221 is a deficient number, since it is larger than the sum of its proper divisors (28131979).

534507221 is a wasteful number, since it uses less digits than its factorization.

534507221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28131978.

The product of its (nonzero) digits is 8400, while the sum is 29.

The square root of 534507221 is about 23119.4122113863. The cubic root of 534507221 is about 811.5548152399.

The spelling of 534507221 in words is "five hundred thirty-four million, five hundred seven thousand, two hundred twenty-one".