51405460 has 24 divisors (see below), whose sum is σ = 112646016. Its totient is φ = 19668000.

The previous prime is 51405413. The next prime is 51405463. The reversal of 51405460 is 6450415.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51405463) 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, 55416 + ... + 56335.

It is an arithmetic number, because the mean of its divisors is an integer number (4693584).

Almost surely, 2^51405460 is an apocalyptic number.

It is an amenable number.

51405460 is an abundant number, since it is smaller than the sum of its proper divisors (61240556).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51405460 is a wasteful number, since it uses less digits than its factorization.

51405460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111783 (or 111781 counting only the distinct ones).

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

The square root of 51405460 is about 7169.7601075629. The cubic root of 51405460 is about 371.8231421226.

Adding to 51405460 its reverse (6450415), we get a palindrome (57855875).

The spelling of 51405460 in words is "fifty-one million, four hundred five thousand, four hundred sixty".