51423250 has 32 divisors (see below), whose sum is σ = 98105904. Its totient is φ = 20176000.

The previous prime is 51423247. The next prime is 51423259. The reversal of 51423250 is 5232415.

It can be written as a sum of positive squares in 8 ways, for example, as 6385729 + 45037521 = 2527^2 + 6711^2 .

It is not an unprimeable number, because it can be changed into a prime (51423259) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11310 + ... + 15190.

Almost surely, 2^51423250 is an apocalyptic number.

51423250 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

51423250 is a deficient number, since it is larger than the sum of its proper divisors (46682654).

51423250 is a wasteful number, since it uses less digits than its factorization.

51423250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3951 (or 3941 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 51423250 is about 7171.0006275275. Note that the first 3 decimals coincide. The cubic root of 51423250 is about 371.8660297250.

Adding to 51423250 its reverse (5232415), we get a palindrome (56655665).

The spelling of 51423250 in words is "fifty-one million, four hundred twenty-three thousand, two hundred fifty".