542221864 has 8 divisors (see below), whose sum is σ = 1016666010. Its totient is φ = 271110928.

The previous prime is 542221831. The next prime is 542221871. The reversal of 542221864 is 468122245.

It can be written as a sum of positive squares in only one way, i.e., 513384964 + 28836900 = 22658^2 + 5370^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33888859 + ... + 33888874.

Almost surely, 2^542221864 is an apocalyptic number.

It is an amenable number.

542221864 is a deficient number, since it is larger than the sum of its proper divisors (474444146).

542221864 is a wasteful number, since it uses less digits than its factorization.

542221864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67777739 (or 67777735 counting only the distinct ones).

The product of its digits is 30720, while the sum is 34.

The square root of 542221864 is about 23285.6579035251. The cubic root of 542221864 is about 815.4406208868.

The spelling of 542221864 in words is "five hundred forty-two million, two hundred twenty-one thousand, eight hundred sixty-four".