247225355520 has 1152 divisors, whose sum is σ = 969189580800. Its totient is φ = 52907212800.

The previous prime is 247225355513. The next prime is 247225355537. The reversal of 247225355520 is 25553522742.

It is a happy number.

It is a super-2 number, since 2×247225355520² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 1778599611 + ... + 1778599749.

It is an arithmetic number, because the mean of its divisors is an integer number (841310400).

Almost surely, 2^247225355520 is an apocalyptic number.

247225355520 is a gapful number since it is divisible by the number (20) 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 247225355520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (484594790400).

247225355520 is an abundant number, since it is smaller than the sum of its proper divisors (721964225280).

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

247225355520 is a wasteful number, since it uses less digits than its factorization.

247225355520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307 (or 293 counting only the distinct ones).

The product of its (nonzero) digits is 840000, while the sum is 42.

The spelling of 247225355520 in words is "two hundred forty-seven billion, two hundred twenty-five million, three hundred fifty-five thousand, five hundred twenty".