51521041006 has 4 divisors (see below), whose sum is σ = 77281561512. Its totient is φ = 25760520502.

The previous prime is 51521041001. The next prime is 51521041021. The reversal of 51521041006 is 60014012515.

It is a happy number.

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 (51521041001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12880260250 + ... + 12880260253.

It is an arithmetic number, because the mean of its divisors is an integer number (19320390378).

Almost surely, 2^51521041006 is an apocalyptic number.

51521041006 is a deficient number, since it is larger than the sum of its proper divisors (25760520506).

51521041006 is a wasteful number, since it uses less digits than its factorization.

51521041006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25760520505.

The product of its (nonzero) digits is 1200, while the sum is 25.

The spelling of 51521041006 in words is "fifty-one billion, five hundred twenty-one million, forty-one thousand, six".