7201223267840 has 240 divisors, whose sum is σ = 20360169178272. Its totient is φ = 2435165945856.

The previous prime is 7201223267809. The next prime is 7201223267863. The reversal of 7201223267840 is 487623221027.

It is a junction number, because it is equal to n+sod(n) for n = 7201223267791 and 7201223267800.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8763917 + ... + 9550323.

Almost surely, 2^{7201223267840} is an apocalyptic number.

7201223267840 is a gapful number since it is divisible by the number (70) 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 7201223267840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10180084589136).

7201223267840 is an abundant number, since it is smaller than the sum of its proper divisors (13158945910432).

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

7201223267840 is an equidigital number, since it uses as much as digits as its factorization.

7201223267840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 786517 (or 786494 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 44.

Adding to 7201223267840 its reverse (487623221027), we get a palindrome (7688846488867).

The spelling of 7201223267840 in words is "seven trillion, two hundred one billion, two hundred twenty-three million, two hundred sixty-seven thousand, eight hundred forty".