23421156 has 24 divisors (see below), whose sum is σ = 59617824. Its totient is φ = 7097280.

The previous prime is 23421149. The next prime is 23421169. The reversal of 23421156 is 65112432.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 88585 + ... + 88848.

It is an arithmetic number, because the mean of its divisors is an integer number (2484076).

Almost surely, 2^23421156 is an apocalyptic number.

It is an amenable number.

23421156 is an abundant number, since it is smaller than the sum of its proper divisors (36196668).

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

23421156 is a wasteful number, since it uses less digits than its factorization.

23421156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177451 (or 177449 counting only the distinct ones).

The product of its digits is 1440, while the sum is 24.

The square root of 23421156 is about 4839.5408873157. The cubic root of 23421156 is about 286.1120235355.

Adding to 23421156 its reverse (65112432), we get a palindrome (88533588).

The spelling of 23421156 in words is "twenty-three million, four hundred twenty-one thousand, one hundred fifty-six".