221404166151 has 32 divisors (see below), whose sum is σ = 349066713600. Its totient is φ = 122134696320.

The previous prime is 221404166129. The next prime is 221404166167. The reversal of 221404166151 is 151661404122.

It is not a de Polignac number, because 221404166151 - 2¹³ = 221404157959 is a prime.

It is a super-2 number, since 2×221404166151² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221404166111) 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, 4377316 + ... + 4427606.

It is an arithmetic number, because the mean of its divisors is an integer number (10908334800).

Almost surely, 2^221404166151 is an apocalyptic number.

221404166151 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

221404166151 is a deficient number, since it is larger than the sum of its proper divisors (127662547449).

221404166151 is a wasteful number, since it uses less digits than its factorization.

221404166151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57559.

The product of its (nonzero) digits is 11520, while the sum is 33.

The spelling of 221404166151 in words is "two hundred twenty-one billion, four hundred four million, one hundred sixty-six thousand, one hundred fifty-one".