51661834 has 16 divisors (see below), whose sum is σ = 90623808. Its totient is φ = 21625632.

The previous prime is 51661811. The next prime is 51661843. The reversal of 51661834 is 43816615.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 51661834.

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, 42307 + ... + 43510.

It is an arithmetic number, because the mean of its divisors is an integer number (5663988).

Almost surely, 2^51661834 is an apocalyptic number.

51661834 is a deficient number, since it is larger than the sum of its proper divisors (38961974).

51661834 is a wasteful number, since it uses less digits than its factorization.

51661834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85869.

The product of its digits is 17280, while the sum is 34.

The square root of 51661834 is about 7187.6167120959. The cubic root of 51661834 is about 372.4402474611.

The spelling of 51661834 in words is "fifty-one million, six hundred sixty-one thousand, eight hundred thirty-four".