542440051 has 4 divisors (see below), whose sum is σ = 543096792. Its totient is φ = 541783312.

The previous prime is 542440037. The next prime is 542440061. The reversal of 542440051 is 150044245.

It is a happy number.

542440051 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 542440051 - 2¹⁷ = 542308979 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 542439998 and 542440025.

It is not an unprimeable number, because it can be changed into a prime (542440061) 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, 327130 + ... + 328783.

It is an arithmetic number, because the mean of its divisors is an integer number (135774198).

Almost surely, 2^542440051 is an apocalyptic number.

542440051 is a deficient number, since it is larger than the sum of its proper divisors (656741).

542440051 is an equidigital number, since it uses as much as digits as its factorization.

542440051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 656740.

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 542440051 is about 23290.3424405911. The cubic root of 542440051 is about 815.5499824449.

Adding to 542440051 its reverse (150044245), we get a palindrome (692484296).

The spelling of 542440051 in words is "five hundred forty-two million, four hundred forty thousand, fifty-one".