51690254 has 32 divisors (see below), whose sum is σ = 98323200. Its totient is φ = 19794240.

The previous prime is 51690179. The next prime is 51690263. The reversal of 51690254 is 45209615.

It is a happy number.

51690254 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×51690254³ (a number of 24 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51690254.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6242 + ... + 11930.

It is an arithmetic number, because the mean of its divisors is an integer number (3072600).

Almost surely, 2^51690254 is an apocalyptic number.

51690254 is a deficient number, since it is larger than the sum of its proper divisors (46632946).

51690254 is a wasteful number, since it uses less digits than its factorization.

51690254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5768.

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 51690254 is about 7189.5934516494. The cubic root of 51690254 is about 372.5085300511.

Adding to 51690254 its reverse (45209615), we get a palindrome (96899869).

The spelling of 51690254 in words is "fifty-one million, six hundred ninety thousand, two hundred fifty-four".