221266629 has 24 divisors (see below), whose sum is σ = 328360032. Its totient is φ = 143526240.

The previous prime is 221266613. The next prime is 221266673. The reversal of 221266629 is 926662122.

It is not a de Polignac number, because 221266629 - 2⁴ = 221266613 is a prime.

It is a super-2 number, since 2×221266629² = 97917842218047282, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 221266593 and 221266602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221261629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 47839 + ... + 52259.

It is an arithmetic number, because the mean of its divisors is an integer number (13681668).

Almost surely, 2^221266629 is an apocalyptic number.

It is an amenable number.

221266629 is a deficient number, since it is larger than the sum of its proper divisors (107093403).

221266629 is a wasteful number, since it uses less digits than its factorization.

221266629 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4577 (or 4574 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 221266629 is about 14875.0337478609. The cubic root of 221266629 is about 604.8374027453.

The spelling of 221266629 in words is "two hundred twenty-one million, two hundred sixty-six thousand, six hundred twenty-nine".