51311006 has 4 divisors (see below), whose sum is σ = 76966512. Its totient is φ = 25655502.

The previous prime is 51311003. The next prime is 51311011. The reversal of 51311006 is 60011315.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51311003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12827750 + ... + 12827753.

It is an arithmetic number, because the mean of its divisors is an integer number (19241628).

Almost surely, 2^51311006 is an apocalyptic number.

51311006 is a deficient number, since it is larger than the sum of its proper divisors (25655506).

51311006 is a wasteful number, since it uses less digits than its factorization.

51311006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25655505.

The product of its (nonzero) digits is 90, while the sum is 17.

The square root of 51311006 is about 7163.1701082691. The cubic root of 51311006 is about 371.5952693418.

The spelling of 51311006 in words is "fifty-one million, three hundred eleven thousand, six".