15421402214240 has 192 divisors, whose sum is σ = 42178141877760. Its totient is φ = 5265994506240.

The previous prime is 15421402214233. The next prime is 15421402214297. The reversal of 15421402214240 is 4241220412451.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 15421402214197 and 15421402214206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12672821 + ... + 13836299.

It is an arithmetic number, because the mean of its divisors is an integer number (219677822280).

Almost surely, 2^{15421402214240} is an apocalyptic number.

15421402214240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15421402214240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21089070938880).

15421402214240 is an abundant number, since it is smaller than the sum of its proper divisors (26756739663520).

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

15421402214240 is a wasteful number, since it uses less digits than its factorization.

15421402214240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1163965 (or 1163957 counting only the distinct ones).

The product of its (nonzero) digits is 20480, while the sum is 32.

Adding to 15421402214240 its reverse (4241220412451), we get a palindrome (19662622626691).

The spelling of 15421402214240 in words is "fifteen trillion, four hundred twenty-one billion, four hundred two million, two hundred fourteen thousand, two hundred forty".