51081236 has 12 divisors (see below), whose sum is σ = 89442528. Its totient is φ = 25526232.

The previous prime is 51081221. The next prime is 51081259. The reversal of 51081236 is 63218015.

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, 10745 + ... + 14751.

It is an arithmetic number, because the mean of its divisors is an integer number (7453544).

Almost surely, 2^51081236 is an apocalyptic number.

It is an amenable number.

51081236 is a deficient number, since it is larger than the sum of its proper divisors (38361292).

51081236 is a wasteful number, since it uses less digits than its factorization.

51081236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7198 (or 7196 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 51081236 is about 7147.1138230757. The cubic root of 51081236 is about 371.0397731279.

The spelling of 51081236 in words is "fifty-one million, eighty-one thousand, two hundred thirty-six".