51573191 has 2 divisors, whose sum is σ = 51573192. Its totient is φ = 51573190.

The previous prime is 51573173. The next prime is 51573209. The reversal of 51573191 is 19137515.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (51573173) and next prime (51573209).

It is a cyclic number.

It is not a de Polignac number, because 51573191 - 2⁶ = 51573127 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51573131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25786595 + 25786596.

It is an arithmetic number, because the mean of its divisors is an integer number (25786596).

Almost surely, 2^51573191 is an apocalyptic number.

51573191 is a deficient number, since it is larger than the sum of its proper divisors (1).

51573191 is an equidigital number, since it uses as much as digits as its factorization.

51573191 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4725, while the sum is 32.

The square root of 51573191 is about 7181.4476952770. The cubic root of 51573191 is about 372.2271106146.

The spelling of 51573191 in words is "fifty-one million, five hundred seventy-three thousand, one hundred ninety-one".