23221005156 has 144 divisors (see below), whose sum is σ = 61947709824. Its totient is φ = 7604741376.

The previous prime is 23221005103. The next prime is 23221005161. The reversal of 23221005156 is 65150012232.

It is a happy number.

23221005156 is a `hidden beast` number, since 23 + 22 + 100 + 515 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 13715046 + ... + 13716738.

Almost surely, 2^23221005156 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 23221005156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30973854912).

23221005156 is an abundant number, since it is smaller than the sum of its proper divisors (38726704668).

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

23221005156 is a wasteful number, since it uses less digits than its factorization.

23221005156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1952 (or 1938 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

Adding to 23221005156 its reverse (65150012232), we get a palindrome (88371017388).

The spelling of 23221005156 in words is "twenty-three billion, two hundred twenty-one million, five thousand, one hundred fifty-six".