221543155321377 has 32 divisors (see below), whose sum is σ = 310431078650880. Its totient is φ = 140344279871040.

The previous prime is 221543155321333. The next prime is 221543155321489. The reversal of 221543155321377 is 773123551345122.

It is not a de Polignac number, because 221543155321377 - 2¹⁴ = 221543155304993 is a prime.

It is a super-2 number, since 2×221543155321377² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (221543155361377) 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, 28374763 + ... + 35330064.

It is an arithmetic number, because the mean of its divisors is an integer number (9700971207840).

Almost surely, 2^{221543155321377} is an apocalyptic number.

It is an amenable number.

221543155321377 is a deficient number, since it is larger than the sum of its proper divisors (88887923329503).

221543155321377 is a wasteful number, since it uses less digits than its factorization.

221543155321377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63705493.

The product of its digits is 5292000, while the sum is 51.

The spelling of 221543155321377 in words is "two hundred twenty-one trillion, five hundred forty-three billion, one hundred fifty-five million, three hundred twenty-one thousand, three hundred seventy-seven".