22151242491 has 8 divisors (see below), whose sum is σ = 33754274304. Its totient is φ = 12657852840.

The previous prime is 22151242489. The next prime is 22151242513. The reversal of 22151242491 is 19424215122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 22151242491 - 2¹ = 22151242489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22151242481) 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, 527410515 + ... + 527410556.

It is an arithmetic number, because the mean of its divisors is an integer number (4219284288).

Almost surely, 2^22151242491 is an apocalyptic number.

22151242491 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

22151242491 is a deficient number, since it is larger than the sum of its proper divisors (11603031813).

22151242491 is a wasteful number, since it uses less digits than its factorization.

22151242491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1054821081.

The product of its digits is 11520, while the sum is 33.

The spelling of 22151242491 in words is "twenty-two billion, one hundred fifty-one million, two hundred forty-two thousand, four hundred ninety-one".