51225211232 has 24 divisors (see below), whose sum is σ = 108607299696. Its totient is φ = 23642404992.

The previous prime is 51225211211. The next prime is 51225211249. The reversal of 51225211232 is 23211252215.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61568348 + ... + 61569179.

It is an arithmetic number, because the mean of its divisors is an integer number (4525304154).

Almost surely, 2^51225211232 is an apocalyptic number.

51225211232 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

51225211232 is an abundant number, since it is smaller than the sum of its proper divisors (57382088464).

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

51225211232 is a wasteful number, since it uses less digits than its factorization.

51225211232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123137550 (or 123137542 counting only the distinct ones).

The product of its digits is 2400, while the sum is 26.

Adding to 51225211232 its reverse (23211252215), we get a palindrome (74436463447).

The spelling of 51225211232 in words is "fifty-one billion, two hundred twenty-five million, two hundred eleven thousand, two hundred thirty-two".