2381221136 has 40 divisors (see below), whose sum is σ = 5415218880. Its totient is φ = 992939904.

The previous prime is 2381221133. The next prime is 2381221159. The reversal of 2381221136 is 6311221832.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 2381221099 and 2381221108.

It is not an unprimeable number, because it can be changed into a prime (2381221133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 283166 + ... + 291453.

It is an arithmetic number, because the mean of its divisors is an integer number (135380472).

Almost surely, 2^2381221136 is an apocalyptic number.

It is an amenable number.

2381221136 is an abundant number, since it is smaller than the sum of its proper divisors (3033997744).

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

2381221136 is a wasteful number, since it uses less digits than its factorization.

2381221136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 574671 (or 574665 counting only the distinct ones).

The product of its digits is 3456, while the sum is 29.

The square root of 2381221136 is about 48797.7574894585. The cubic root of 2381221136 is about 1335.3647553106.

Adding to 2381221136 its reverse (6311221832), we get a palindrome (8692442968).

The spelling of 2381221136 in words is "two billion, three hundred eighty-one million, two hundred twenty-one thousand, one hundred thirty-six".