51102686 has 4 divisors (see below), whose sum is σ = 76654032. Its totient is φ = 25551342.

The previous prime is 51102683. The next prime is 51102691. The reversal of 51102686 is 68620115.

It is a happy number.

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

It is a super-2 number, since 2×51102686² = 5222969032829192, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51102683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12775670 + ... + 12775673.

It is an arithmetic number, because the mean of its divisors is an integer number (19163508).

Almost surely, 2^51102686 is an apocalyptic number.

51102686 is a deficient number, since it is larger than the sum of its proper divisors (25551346).

51102686 is a wasteful number, since it uses less digits than its factorization.

51102686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25551345.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 51102686 is about 7148.6142713116. The cubic root of 51102686 is about 371.0917014548.

The spelling of 51102686 in words is "fifty-one million, one hundred two thousand, six hundred eighty-six".