221534456134542 has 16 divisors (see below), whose sum is σ = 455043747736272. Its totient is φ = 71849012800320.

The previous prime is 221534456134531. The next prime is 221534456134633. The reversal of 221534456134542 is 245431654435122.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 498951477559 + ... + 498951478002.

It is an arithmetic number, because the mean of its divisors is an integer number (28440234233517).

Almost surely, 2^{221534456134542} is an apocalyptic number.

221534456134542 is an abundant number, since it is smaller than the sum of its proper divisors (233509291601730).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221534456134542 is a wasteful number, since it uses less digits than its factorization.

221534456134542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 997902955603.

The product of its digits is 13824000, while the sum is 51.

The spelling of 221534456134542 in words is "two hundred twenty-one trillion, five hundred thirty-four billion, four hundred fifty-six million, one hundred thirty-four thousand, five hundred forty-two".