51253206 has 8 divisors (see below), whose sum is σ = 102506424. Its totient is φ = 17084400.

The previous prime is 51253201. The next prime is 51253219. The reversal of 51253206 is 60235215.

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

51253206 is an admirable number.

It is a super-2 number, since 2×51253206² = 5253782250556872, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51253201) 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, 4271095 + ... + 4271106.

It is an arithmetic number, because the mean of its divisors is an integer number (12813303).

Almost surely, 2^51253206 is an apocalyptic number.

51253206 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.

51253206 is a wasteful number, since it uses less digits than its factorization.

51253206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8542206.

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 51253206 is about 7159.1344448893. The cubic root of 51253206 is about 371.4556873554.

Subtracting 51253206 from its reverse (60235215), we obtain a square (8982009 = 2997²).

The spelling of 51253206 in words is "fifty-one million, two hundred fifty-three thousand, two hundred six".