51525220224 has 128 divisors (see below), whose sum is σ = 145024416000. Its totient is φ = 16163020800.

The previous prime is 51525220211. The next prime is 51525220237. The reversal of 51525220224 is 42202252515.

It is an interprime number because it is at equal distance from previous prime (51525220211) and next prime (51525220237).

It is a tau number, because it is divible by the number of its divisors (128).

It is a super-2 number, since 2×51525220224² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51525220191 and 51525220200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1078312 + ... + 1125080.

It is an arithmetic number, because the mean of its divisors is an integer number (1133003250).

Almost surely, 2^51525220224 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 51525220224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72512208000).

51525220224 is an abundant number, since it is smaller than the sum of its proper divisors (93499195776).

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

51525220224 is a wasteful number, since it uses less digits than its factorization.

51525220224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46956 (or 46944 counting only the distinct ones).

The product of its (nonzero) digits is 16000, while the sum is 30.

Adding to 51525220224 its reverse (42202252515), we get a palindrome (93727472739).

The spelling of 51525220224 in words is "fifty-one billion, five hundred twenty-five million, two hundred twenty thousand, two hundred twenty-four".