51432502 has 24 divisors (see below), whose sum is σ = 85472712. Its totient is φ = 23210220.

The previous prime is 51432499. The next prime is 51432509. The reversal of 51432502 is 20523415.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51432509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 369949 + ... + 370087.

It is an arithmetic number, because the mean of its divisors is an integer number (3561363).

Almost surely, 2^51432502 is an apocalyptic number.

51432502 is a deficient number, since it is larger than the sum of its proper divisors (34040210).

51432502 is an equidigital number, since it uses as much as digits as its factorization.

51432502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313 (or 152 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 51432502 is about 7171.6456967700. The cubic root of 51432502 is about 371.8883302615. Note that the first 3 decimals are identical.

Multiplying 51432502 by its sum of digits (22), we get a square (1131515044 = 33638²).

51432502 divided by its sum of digits (22) gives a square (2337841 = 1529²).

Adding to 51432502 its reverse (20523415), we get a palindrome (71955917).

The spelling of 51432502 in words is "fifty-one million, four hundred thirty-two thousand, five hundred two".