221402692 has 48 divisors (see below), whose sum is σ = 469969920. Its totient is φ = 89207712.

The previous prime is 221402683. The next prime is 221402767. The reversal of 221402692 is 296204122.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a self number, because there is not a number n which added to its sum of digits gives 221402692.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35083 + ... + 40909.

It is an arithmetic number, because the mean of its divisors is an integer number (9791040).

Almost surely, 2^221402692 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221402692, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (234984960).

221402692 is an abundant number, since it is smaller than the sum of its proper divisors (248567228).

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

221402692 is a wasteful number, since it uses less digits than its factorization.

221402692 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5920 (or 5918 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 221402692 is about 14879.6065808206. The cubic root of 221402692 is about 604.9613544516.

The spelling of 221402692 in words is "two hundred twenty-one million, four hundred two thousand, six hundred ninety-two".