51172573 has 2 divisors, whose sum is σ = 51172574. Its totient is φ = 51172572.

The previous prime is 51172553. The next prime is 51172579. The reversal of 51172573 is 37527115.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48748324 + 2424249 = 6982^2 + 1557^2 .

It is a cyclic number.

It is not a de Polignac number, because 51172573 - 2⁹ = 51172061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51172579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25586286 + 25586287.

It is an arithmetic number, because the mean of its divisors is an integer number (25586287).

Almost surely, 2^51172573 is an apocalyptic number.

It is an amenable number.

51172573 is a deficient number, since it is larger than the sum of its proper divisors (1).

51172573 is an equidigital number, since it uses as much as digits as its factorization.

51172573 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7350, while the sum is 31.

The square root of 51172573 is about 7153.5007513804. The cubic root of 51172573 is about 371.2607902331.

Adding to 51172573 its reverse (37527115), we get a palindrome (88699688).

The spelling of 51172573 in words is "fifty-one million, one hundred seventy-two thousand, five hundred seventy-three".