51516254 has 16 divisors (see below), whose sum is σ = 79380000. Its totient is φ = 25059840.

The previous prime is 51516221. The next prime is 51516271. The reversal of 51516254 is 45261515.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40622 + ... + 41870.

It is an arithmetic number, because the mean of its divisors is an integer number (4961250).

Almost surely, 2^51516254 is an apocalyptic number.

51516254 is a deficient number, since it is larger than the sum of its proper divisors (27863746).

51516254 is a wasteful number, since it uses less digits than its factorization.

51516254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1795.

The product of its digits is 6000, while the sum is 29.

The square root of 51516254 is about 7177.4824277040. The cubic root of 51516254 is about 372.0900801238.

Adding to 51516254 its reverse (45261515), we get a palindrome (96777769).

The spelling of 51516254 in words is "fifty-one million, five hundred sixteen thousand, two hundred fifty-four".