51451252432 has 20 divisors (see below), whose sum is σ = 99778040260. Its totient is φ = 25702080768.

The previous prime is 51451252399. The next prime is 51451252439. The reversal of 51451252432 is 23425215415.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 35503603776 + 15947648656 = 188424^2 + 126284^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51451252439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1453557 + ... + 1488532.

It is an arithmetic number, because the mean of its divisors is an integer number (4988902013).

Almost surely, 2^51451252432 is an apocalyptic number.

It is an amenable number.

51451252432 is a deficient number, since it is larger than the sum of its proper divisors (48326787828).

51451252432 is a wasteful number, since it uses less digits than its factorization.

51451252432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2943190 (or 2943184 counting only the distinct ones).

The product of its digits is 48000, while the sum is 34.

Adding to 51451252432 its reverse (23425215415), we get a palindrome (74876467847).

The spelling of 51451252432 in words is "fifty-one billion, four hundred fifty-one million, two hundred fifty-two thousand, four hundred thirty-two".