15221447046 has 192 divisors, whose sum is σ = 39744613440. Its totient is φ = 4298711040.

The previous prime is 15221446997. The next prime is 15221447069. The reversal of 15221447046 is 64074412251.

15221447046 is a `hidden beast` number, since 152 + 21 + 447 + 0 + 46 = 666.

It is a super-2 number, since 2×15221447046² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 15221447046.

It is a congruent number.

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, 6359626 + ... + 6362018.

It is an arithmetic number, because the mean of its divisors is an integer number (207003195).

Almost surely, 2^15221447046 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15221447046, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19872306720).

15221447046 is an abundant number, since it is smaller than the sum of its proper divisors (24523166394).

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

15221447046 is a wasteful number, since it uses less digits than its factorization.

15221447046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2488 (or 2469 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 36.

Adding to 15221447046 its reverse (64074412251), we get a palindrome (79295859297).

The spelling of 15221447046 in words is "fifteen billion, two hundred twenty-one million, four hundred forty-seven thousand, forty-six".