7225421667450 has 288 divisors, whose sum is σ = 21758497831296. Its totient is φ = 1579167152640.

The previous prime is 7225421667437. The next prime is 7225421667487. The reversal of 7225421667450 is 547661245227.

It is a junction number, because it is equal to n+sod(n) for n = 7225421667393 and 7225421667402.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 651344104 + ... + 651355196.

It is an arithmetic number, because the mean of its divisors is an integer number (75550339692).

Almost surely, 2^{7225421667450} is an apocalyptic number.

7225421667450 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 7225421667450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10879248915648).

7225421667450 is an abundant number, since it is smaller than the sum of its proper divisors (14533076163846).

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

7225421667450 is a wasteful number, since it uses less digits than its factorization.

7225421667450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14998 (or 14986 counting only the distinct ones).

The product of its (nonzero) digits is 5644800, while the sum is 51.

The spelling of 7225421667450 in words is "seven trillion, two hundred twenty-five billion, four hundred twenty-one million, six hundred sixty-seven thousand, four hundred fifty".