220734421 has 4 divisors (see below), whose sum is σ = 222056352. Its totient is φ = 219412492.

The previous prime is 220734413. The next prime is 220734431. The reversal of 220734421 is 124437022.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 220734421 - 2³ = 220734413 is a prime.

It is a super-2 number, since 2×220734421² = 97447369228410482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220734431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 660715 + ... + 661048.

It is an arithmetic number, because the mean of its divisors is an integer number (55514088).

Almost surely, 2^220734421 is an apocalyptic number.

It is an amenable number.

220734421 is a deficient number, since it is larger than the sum of its proper divisors (1321931).

220734421 is a wasteful number, since it uses less digits than its factorization.

220734421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1321930.

The product of its (nonzero) digits is 2688, while the sum is 25.

The square root of 220734421 is about 14857.1336737609. The cubic root of 220734421 is about 604.3520791680.

The spelling of 220734421 in words is "two hundred twenty million, seven hundred thirty-four thousand, four hundred twenty-one".