221055954537 has 32 divisors (see below), whose sum is σ = 338499141120. Its totient is φ = 126906981120.

The previous prime is 221055954521. The next prime is 221055954571. The reversal of 221055954537 is 735459550122.

It is not a de Polignac number, because 221055954537 - 2⁴ = 221055954521 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221055954137) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7278738 + ... + 7309044.

It is an arithmetic number, because the mean of its divisors is an integer number (10578098160).

Almost surely, 2^221055954537 is an apocalyptic number.

221055954537 is the 383889-th pentagonal number.

It is an amenable number.

221055954537 is a deficient number, since it is larger than the sum of its proper divisors (117443186583).

221055954537 is a wasteful number, since it uses less digits than its factorization.

221055954537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41973.

The product of its (nonzero) digits is 1890000, while the sum is 48.

The spelling of 221055954537 in words is "two hundred twenty-one billion, fifty-five million, nine hundred fifty-four thousand, five hundred thirty-seven".