281385237056 has 224 divisors, whose sum is σ = 738902207232. Its totient is φ = 102930186240.

The previous prime is 281385237037. The next prime is 281385237109. The reversal of 281385237056 is 650732583182.

It is a tau number, because it is divible by the number of its divisors (224).

It is a super-2 number, since 2×281385237056² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 281385236995 and 281385237013.

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, 36271130 + ... + 36278886.

It is an arithmetic number, because the mean of its divisors is an integer number (3298670568).

Almost surely, 2^281385237056 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 281385237056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (369451103616).

281385237056 is an abundant number, since it is smaller than the sum of its proper divisors (457516970176).

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

281385237056 is a wasteful number, since it uses less digits than its factorization.

281385237056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8237 (or 8227 counting only the distinct ones).

The product of its (nonzero) digits is 2419200, while the sum is 50.

The spelling of 281385237056 in words is "two hundred eighty-one billion, three hundred eighty-five million, two hundred thirty-seven thousand, fifty-six".