51801959 has 8 divisors (see below), whose sum is σ = 57227520. Its totient is φ = 46495800.

The previous prime is 51801949. The next prime is 51801979. The reversal of 51801959 is 95910815.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51801959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51801929) 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, 28937 + ... + 30674.

It is an arithmetic number, because the mean of its divisors is an integer number (7153440).

Almost surely, 2^51801959 is an apocalyptic number.

51801959 is a deficient number, since it is larger than the sum of its proper divisors (5425561).

51801959 is a wasteful number, since it uses less digits than its factorization.

51801959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59701.

The product of its (nonzero) digits is 16200, while the sum is 38.

The square root of 51801959 is about 7197.3577790742. The cubic root of 51801959 is about 372.7766729703.

The spelling of 51801959 in words is "fifty-one million, eight hundred one thousand, nine hundred fifty-nine".