22151212434 has 192 divisors, whose sum is σ = 56203580160. Its totient is φ = 6246512640.

The previous prime is 22151212411. The next prime is 22151212459. The reversal of 22151212434 is 43421215122.

22151212434 is a `hidden beast` number, since 2 + 2 + 15 + 1 + 212 + 434 = 666.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 22151212398 and 22151212407.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 24972739 + ... + 24973625.

It is an arithmetic number, because the mean of its divisors is an integer number (292726980).

Almost surely, 2^22151212434 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22151212434, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28101790080).

22151212434 is an abundant number, since it is smaller than the sum of its proper divisors (34052367726).

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

22151212434 is a wasteful number, since it uses less digits than its factorization.

22151212434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1105 (or 1102 counting only the distinct ones).

The product of its digits is 3840, while the sum is 27.

Adding to 22151212434 its reverse (43421215122), we get a palindrome (65572427556).

The spelling of 22151212434 in words is "twenty-two billion, one hundred fifty-one million, two hundred twelve thousand, four hundred thirty-four".