51231773 has 4 divisors (see below), whose sum is σ = 51413088. Its totient is φ = 51050460.

The previous prime is 51231767. The next prime is 51231779. The reversal of 51231773 is 37713215.

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 an interprime number because it is at equal distance from previous prime (51231767) and next prime (51231779).

It is a cyclic number.

It is not a de Polignac number, because 51231773 - 2⁴ = 51231757 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51231779) 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, 90233 + ... + 90798.

It is an arithmetic number, because the mean of its divisors is an integer number (12853272).

Almost surely, 2^51231773 is an apocalyptic number.

It is an amenable number.

51231773 is a deficient number, since it is larger than the sum of its proper divisors (181315).

51231773 is a wasteful number, since it uses less digits than its factorization.

51231773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181314.

The product of its digits is 4410, while the sum is 29.

The square root of 51231773 is about 7157.6373895302. The cubic root of 51231773 is about 371.4039018484.

Adding to 51231773 its reverse (37713215), we get a palindrome (88944988).

The spelling of 51231773 in words is "fifty-one million, two hundred thirty-one thousand, seven hundred seventy-three".