51432530 has 8 divisors (see below), whose sum is σ = 92578572. Its totient is φ = 20573008.

The previous prime is 51432509. The next prime is 51432547. The reversal of 51432530 is 3523415.

It can be written as a sum of positive squares in 2 ways, for example, as 50794129 + 638401 = 7127^2 + 799^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 51432496 and 51432505.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2571617 + ... + 2571636.

Almost surely, 2^51432530 is an apocalyptic number.

51432530 is a deficient number, since it is larger than the sum of its proper divisors (41146042).

51432530 is a wasteful number, since it uses less digits than its factorization.

51432530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5143260.

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 51432530 is about 7171.6476489019. The cubic root of 51432530 is about 371.8883977472. Note that the first 3 decimals are identical.

Adding to 51432530 its reverse (3523415), we get a palindrome (54955945).

The spelling of 51432530 in words is "fifty-one million, four hundred thirty-two thousand, five hundred thirty".