542216115251 has 4 divisors (see below), whose sum is σ = 574111180872. Its totient is φ = 510321049632.

The previous prime is 542216115227. The next prime is 542216115253. The reversal of 542216115251 is 152511612245.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 152511612245 = 5 ⋅30502322449.

It is a cyclic number.

It is not a de Polignac number, because 542216115251 - 2²⁶ = 542149006387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (542216115253) 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, 15947532785 + ... + 15947532818.

It is an arithmetic number, because the mean of its divisors is an integer number (143527795218).

Almost surely, 2^542216115251 is an apocalyptic number.

542216115251 is a deficient number, since it is larger than the sum of its proper divisors (31895065621).

542216115251 is a wasteful number, since it uses less digits than its factorization.

542216115251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31895065620.

The product of its digits is 24000, while the sum is 35.

Adding to 542216115251 its reverse (152511612245), we get a palindrome (694727727496).

The spelling of 542216115251 in words is "five hundred forty-two billion, two hundred sixteen million, one hundred fifteen thousand, two hundred fifty-one".