221302040 has 16 divisors (see below), whose sum is σ = 497929680. Its totient is φ = 88520800.

The previous prime is 221302033. The next prime is 221302049. The reversal of 221302040 is 40203122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221302049) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2766236 + ... + 2766315.

It is an arithmetic number, because the mean of its divisors is an integer number (31120605).

Almost surely, 2^221302040 is an apocalyptic number.

221302040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221302040 is an abundant number, since it is smaller than the sum of its proper divisors (276627640).

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

221302040 is a wasteful number, since it uses less digits than its factorization.

221302040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5532562 (or 5532558 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 221302040 is about 14876.2239832560. The cubic root of 221302040 is about 604.8696666177.

Adding to 221302040 its reverse (40203122), we get a palindrome (261505162).

The spelling of 221302040 in words is "two hundred twenty-one million, three hundred two thousand, forty".