51531010206 has 16 divisors (see below), whose sum is σ = 110989868304. Its totient is φ = 15855695424.

The previous prime is 51531010133. The next prime is 51531010217. The reversal of 51531010206 is 60201013515.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 330326911 + ... + 330327066.

It is an arithmetic number, because the mean of its divisors is an integer number (6936866769).

Almost surely, 2^51531010206 is an apocalyptic number.

51531010206 is an abundant number, since it is smaller than the sum of its proper divisors (59458858098).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51531010206 is a wasteful number, since it uses less digits than its factorization.

51531010206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 660653995.

The product of its (nonzero) digits is 900, while the sum is 24.

The spelling of 51531010206 in words is "fifty-one billion, five hundred thirty-one million, ten thousand, two hundred six".