51001698 has 32 divisors (see below), whose sum is σ = 113870592. Its totient is φ = 15094800.

The previous prime is 51001619. The next prime is 51001729. The reversal of 51001698 is 89610015.

It is a happy number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6148 + ... + 11823.

It is an arithmetic number, because the mean of its divisors is an integer number (3558456).

Almost surely, 2^51001698 is an apocalyptic number.

51001698 is an abundant number, since it is smaller than the sum of its proper divisors (62868894).

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

51001698 is a wasteful number, since it uses less digits than its factorization.

51001698 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18030.

The product of its (nonzero) digits is 2160, while the sum is 30.

The square root of 51001698 is about 7141.5473113325. The cubic root of 51001698 is about 370.8470925108.

The spelling of 51001698 in words is "fifty-one million, one thousand, six hundred ninety-eight".