51405254 has 16 divisors (see below), whose sum is σ = 80117376. Its totient is φ = 24710400.

The previous prime is 51405239. The next prime is 51405259. The reversal of 51405254 is 45250415.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51405259) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7094 + ... + 12374.

It is an arithmetic number, because the mean of its divisors is an integer number (5007336).

Almost surely, 2^51405254 is an apocalyptic number.

51405254 is a deficient number, since it is larger than the sum of its proper divisors (28712122).

51405254 is a wasteful number, since it uses less digits than its factorization.

51405254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5471.

The product of its (nonzero) digits is 4000, while the sum is 26.

The square root of 51405254 is about 7169.7457416564. The cubic root of 51405254 is about 371.8226454460.

Adding to 51405254 its reverse (45250415), we get a palindrome (96655669).

The spelling of 51405254 in words is "fifty-one million, four hundred five thousand, two hundred fifty-four".