51105206 has 4 divisors (see below), whose sum is σ = 76657812. Its totient is φ = 25552602.

The previous prime is 51105167. The next prime is 51105239. The reversal of 51105206 is 60250115.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×51105206² = 5223484160604872, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12776300 + ... + 12776303.

It is an arithmetic number, because the mean of its divisors is an integer number (19164453).

Almost surely, 2^51105206 is an apocalyptic number.

51105206 is a deficient number, since it is larger than the sum of its proper divisors (25552606).

51105206 is a wasteful number, since it uses less digits than its factorization.

51105206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25552605.

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 51105206 is about 7148.7905270752. The cubic root of 51105206 is about 371.0978011715.

The spelling of 51105206 in words is "fifty-one million, one hundred five thousand, two hundred six".