51222332400 has 60 divisors (see below), whose sum is σ = 164082208632. Its totient is φ = 13659288320.

The previous prime is 51222332377. The next prime is 51222332417. The reversal of 51222332400 is 423322215.

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21341439 + ... + 21343838.

Almost surely, 2^51222332400 is an apocalyptic number.

51222332400 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51222332400 is an abundant number, since it is smaller than the sum of its proper divisors (112859876232).

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

51222332400 is a wasteful number, since it uses less digits than its factorization.

51222332400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42685298 (or 42685287 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 24.

Adding to 51222332400 its reverse (423322215), we get a palindrome (51645654615).

The spelling of 51222332400 in words is "fifty-one billion, two hundred twenty-two million, three hundred thirty-two thousand, four hundred".