229272021636 has 192 divisors, whose sum is σ = 653550653952. Its totient is φ = 61065658368.

The previous prime is 229272021577. The next prime is 229272021637. The reversal of 229272021636 is 636120272922.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (229272021637) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 79139740 + ... + 79142636.

It is an arithmetic number, because the mean of its divisors is an integer number (3403909656).

Almost surely, 2^229272021636 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 229272021636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (326775326976).

229272021636 is an abundant number, since it is smaller than the sum of its proper divisors (424278632316).

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

229272021636 is a wasteful number, since it uses less digits than its factorization.

229272021636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3438 (or 3436 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 42.

The spelling of 229272021636 in words is "two hundred twenty-nine billion, two hundred seventy-two million, twenty-one thousand, six hundred thirty-six".