51224231552 has 128 divisors (see below), whose sum is σ = 111633500160. Its totient is φ = 23271616512.

The previous prime is 51224231533. The next prime is 51224231579. The reversal of 51224231552 is 25513242215.

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

It is a Harshad number since it is a multiple of its sum of digits (32).

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, 30801473 + ... + 30803135.

It is an arithmetic number, because the mean of its divisors is an integer number (872136720).

Almost surely, 2^51224231552 is an apocalyptic number.

51224231552 is a gapful number since it is divisible by the number (52) 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 51224231552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55816750080).

51224231552 is an abundant number, since it is smaller than the sum of its proper divisors (60409268608).

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

51224231552 is a wasteful number, since it uses less digits than its factorization.

51224231552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1970 (or 1958 counting only the distinct ones).

The product of its digits is 24000, while the sum is 32.

Adding to 51224231552 its reverse (25513242215), we get a palindrome (76737473767).

The spelling of 51224231552 in words is "fifty-one billion, two hundred twenty-four million, two hundred thirty-one thousand, five hundred fifty-two".