51220254 has 8 divisors (see below), whose sum is σ = 102440520. Its totient is φ = 17073416.

The previous prime is 51220223. The next prime is 51220291. The reversal of 51220254 is 45202215.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

51220254 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 51220254.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4268349 + ... + 4268360.

It is an arithmetic number, because the mean of its divisors is an integer number (12805065).

Almost surely, 2^51220254 is an apocalyptic number.

51220254 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51220254 is a wasteful number, since it uses less digits than its factorization.

51220254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8536714.

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 51220254 is about 7156.8326793352. The cubic root of 51220254 is about 371.3760641612.

Adding to 51220254 its reverse (45202215), we get a palindrome (96422469).

The spelling of 51220254 in words is "fifty-one million, two hundred twenty thousand, two hundred fifty-four".