542221236 has 96 divisors (see below), whose sum is σ = 1493856000. Its totient is φ = 169755264.

The previous prime is 542221231. The next prime is 542221237. The reversal of 542221236 is 632122245.

It is a happy number.

542221236 is a `hidden beast` number, since 5 + 422 + 2 + 1 + 236 = 666.

It is a super-3 number, since 3×542221236³ (a number of 27 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (542221231) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 113545 + ... + 118223.

It is an arithmetic number, because the mean of its divisors is an integer number (15561000).

Almost surely, 2^542221236 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 542221236, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (746928000).

542221236 is an abundant number, since it is smaller than the sum of its proper divisors (951634764).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

542221236 is a wasteful number, since it uses less digits than its factorization.

542221236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4758 (or 4750 counting only the distinct ones).

The product of its digits is 5760, while the sum is 27.

The square root of 542221236 is about 23285.6444188259. The cubic root of 542221236 is about 815.4403060729.

The spelling of 542221236 in words is "five hundred forty-two million, two hundred twenty-one thousand, two hundred thirty-six".