542245055155421 has 4 divisors (see below), whose sum is σ = 543988608387744. Its totient is φ = 540501501923100.

The previous prime is 542245055155387. The next prime is 542245055155459. The reversal of 542245055155421 is 124551550542245.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 542245055155421 - 2³⁰ = 542243981413597 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 542245055155421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (542245055155121) 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, 871776615695 + ... + 871776616316.

It is an arithmetic number, because the mean of its divisors is an integer number (135997152096936).

Almost surely, 2^{542245055155421} is an apocalyptic number.

It is an amenable number.

542245055155421 is a deficient number, since it is larger than the sum of its proper divisors (1743553232323).

542245055155421 is a wasteful number, since it uses less digits than its factorization.

542245055155421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1743553232322.

The product of its (nonzero) digits is 8000000, while the sum is 50.

The spelling of 542245055155421 in words is "five hundred forty-two trillion, two hundred forty-five billion, fifty-five million, one hundred fifty-five thousand, four hundred twenty-one".