15550138422 has 192 divisors, whose sum is σ = 44370493440. Its totient is φ = 3821126400.

The previous prime is 15550138421. The next prime is 15550138463. The reversal of 15550138422 is 22483105551.

15550138422 is a `hidden beast` number, since 1 + 5 + 550 + 1 + 3 + 84 + 22 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15550138421) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1894347 + ... + 1902537.

It is an arithmetic number, because the mean of its divisors is an integer number (231096320).

Almost surely, 2^15550138422 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15550138422, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22185246720).

15550138422 is an abundant number, since it is smaller than the sum of its proper divisors (28820355018).

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

15550138422 is a wasteful number, since it uses less digits than its factorization.

15550138422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8299 (or 8296 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 36.

The spelling of 15550138422 in words is "fifteen billion, five hundred fifty million, one hundred thirty-eight thousand, four hundred twenty-two".