51606890 has 16 divisors (see below), whose sum is σ = 93018240. Its totient is φ = 20614800.

The previous prime is 51606889. The next prime is 51606899. The reversal of 51606890 is 9860615.

It is a self number, because there is not a number n which added to its sum of digits gives 51606890.

It is not an unprimeable number, because it can be changed into a prime (51606899) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5315 + ... + 11465.

It is an arithmetic number, because the mean of its divisors is an integer number (5813640).

Almost surely, 2^51606890 is an apocalyptic number.

51606890 is a deficient number, since it is larger than the sum of its proper divisors (41411350).

51606890 is a wasteful number, since it uses less digits than its factorization.

51606890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6997.

The product of its (nonzero) digits is 12960, while the sum is 35.

The square root of 51606890 is about 7183.7935660764. The cubic root of 51606890 is about 372.3081666183.

The spelling of 51606890 in words is "fifty-one million, six hundred six thousand, eight hundred ninety".