51405193 has 4 divisors (see below), whose sum is σ = 58748800. Its totient is φ = 44061588.

The previous prime is 51405187. The next prime is 51405217. The reversal of 51405193 is 39150415.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 51405193 - 2⁹ = 51404681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51402193) 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, 3671793 + ... + 3671806.

It is an arithmetic number, because the mean of its divisors is an integer number (14687200).

Almost surely, 2^51405193 is an apocalyptic number.

It is an amenable number.

51405193 is a deficient number, since it is larger than the sum of its proper divisors (7343607).

51405193 is an equidigital number, since it uses as much as digits as its factorization.

51405193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7343606.

The product of its (nonzero) digits is 2700, while the sum is 28.

The square root of 51405193 is about 7169.7414876689. The cubic root of 51405193 is about 371.8224983716.

The spelling of 51405193 in words is "fifty-one million, four hundred five thousand, one hundred ninety-three".