51405352 has 16 divisors (see below), whose sum is σ = 96485940. Its totient is φ = 25675776.

The previous prime is 51405337. The next prime is 51405353. The reversal of 51405352 is 25350415.

It can be written as a sum of positive squares in 2 ways, for example, as 50495236 + 910116 = 7106^2 + 954^2 .

It is not an unprimeable number, because it can be changed into a prime (51405353) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6438 + ... + 12010.

Almost surely, 2^51405352 is an apocalyptic number.

It is an amenable number.

51405352 is a deficient number, since it is larger than the sum of its proper divisors (45080588).

51405352 is a wasteful number, since it uses less digits than its factorization.

51405352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6732 (or 6728 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 51405352 is about 7169.7525759262. The cubic root of 51405352 is about 371.8228817292.

Adding to 51405352 its reverse (25350415), we get a palindrome (76755767).

The spelling of 51405352 in words is "fifty-one million, four hundred five thousand, three hundred fifty-two".