51451432 has 8 divisors (see below), whose sum is σ = 96471450. Its totient is φ = 25725712.

The previous prime is 51451427. The next prime is 51451441. The reversal of 51451432 is 23415415.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 47969476 + 3481956 = 6926^2 + 1866^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 51451397 and 51451406.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3215707 + ... + 3215722.

Almost surely, 2^51451432 is an apocalyptic number.

It is an amenable number.

51451432 is a deficient number, since it is larger than the sum of its proper divisors (45020018).

51451432 is a wasteful number, since it uses less digits than its factorization.

51451432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6431435 (or 6431431 counting only the distinct ones).

The product of its digits is 2400, while the sum is 25.

The square root of 51451432 is about 7172.9653561132. The cubic root of 51451432 is about 371.9339498102.

Adding to 51451432 its reverse (23415415), we get a palindrome (74866847).

The spelling of 51451432 in words is "fifty-one million, four hundred fifty-one thousand, four hundred thirty-two".