542992221 has 8 divisors (see below), whose sum is σ = 804432960. Its totient is φ = 361994796.

The previous prime is 542992213. The next prime is 542992237. The reversal of 542992221 is 122299245.

542992221 is a `hidden beast` number, since 5 + 429 + 9 + 2 + 221 = 666.

It is not a de Polignac number, because 542992221 - 2³ = 542992213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (542992421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10055385 + ... + 10055438.

It is an arithmetic number, because the mean of its divisors is an integer number (100554120).

Almost surely, 2^542992221 is an apocalyptic number.

It is an amenable number.

542992221 is a deficient number, since it is larger than the sum of its proper divisors (261440739).

542992221 is a wasteful number, since it uses less digits than its factorization.

542992221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20110832 (or 20110826 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 542992221 is about 23302.1934804430. The cubic root of 542992221 is about 815.8266148699.

The spelling of 542992221 in words is "five hundred forty-two million, nine hundred ninety-two thousand, two hundred twenty-one".