51017690 has 16 divisors (see below), whose sum is σ = 92270880. Its totient is φ = 20309520.

The previous prime is 51017677. The next prime is 51017711. The reversal of 51017690 is 9671015.

It is a happy number.

It is a super-2 number, since 2×51017690² = 5205609385872200, which contains 22 as substring.

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, 9980 + ... + 14199.

It is an arithmetic number, because the mean of its divisors is an integer number (5766930).

Almost surely, 2^51017690 is an apocalyptic number.

51017690 is a deficient number, since it is larger than the sum of its proper divisors (41253190).

51017690 is a wasteful number, since it uses less digits than its factorization.

51017690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24397.

The product of its (nonzero) digits is 1890, while the sum is 29.

The square root of 51017690 is about 7142.6668688943. Note that the first 3 decimals coincide. The cubic root of 51017690 is about 370.8858491744.

The spelling of 51017690 in words is "fifty-one million, seventeen thousand, six hundred ninety".