542191213442 has 4 divisors (see below), whose sum is σ = 813286820166. Its totient is φ = 271095606720.

The previous prime is 542191213363. The next prime is 542191213451. The reversal of 542191213442 is 244312191245.

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

It can be written as a sum of positive squares in only one way, i.e., 456758353921 + 85432859521 = 675839^2 + 292289^2 .

It is a junction number, because it is equal to n+sod(n) for n = 542191213396 and 542191213405.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 135547803359 + ... + 135547803362.

Almost surely, 2^542191213442 is an apocalyptic number.

542191213442 is a deficient number, since it is larger than the sum of its proper divisors (271095606724).

542191213442 is a wasteful number, since it uses less digits than its factorization.

542191213442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271095606723.

The product of its digits is 69120, while the sum is 38.

The spelling of 542191213442 in words is "five hundred forty-two billion, one hundred ninety-one million, two hundred thirteen thousand, four hundred forty-two".