534550021 has 4 divisors (see below), whose sum is σ = 534728844. Its totient is φ = 534371200.

The previous prime is 534550013. The next prime is 534550033. The reversal of 534550021 is 120055435.

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

It can be written as a sum of positive squares in 2 ways, for example, as 420701121 + 113848900 = 20511^2 + 10670^2 .

It is a cyclic number.

It is not a de Polignac number, because 534550021 - 2³ = 534550013 is a prime.

It is a super-2 number, since 2×534550021² = 571487449902200882, 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 (534550001) 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, 84850 + ... + 90931.

It is an arithmetic number, because the mean of its divisors is an integer number (133682211).

Almost surely, 2^534550021 is an apocalyptic number.

It is an amenable number.

534550021 is a deficient number, since it is larger than the sum of its proper divisors (178823).

534550021 is a wasteful number, since it uses less digits than its factorization.

534550021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178822.

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 534550021 is about 23120.3378219264. The cubic root of 534550021 is about 811.5764760755.

The spelling of 534550021 in words is "five hundred thirty-four million, five hundred fifty thousand, twenty-one".