51651983 has 8 divisors (see below), whose sum is σ = 53706240. Its totient is φ = 49622040.

The previous prime is 51651973. The next prime is 51652009. The reversal of 51651983 is 38915615.

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

It is a cyclic number.

It is not a de Polignac number, because 51651983 - 2¹⁴ = 51635599 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 (51651973) 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, 1685 + ... + 10302.

It is an arithmetic number, because the mean of its divisors is an integer number (6713280).

Almost surely, 2^51651983 is an apocalyptic number.

51651983 is a deficient number, since it is larger than the sum of its proper divisors (2054257).

51651983 is a wasteful number, since it uses less digits than its factorization.

51651983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12157.

The product of its digits is 32400, while the sum is 38.

The square root of 51651983 is about 7186.9314035964. The cubic root of 51651983 is about 372.4165733622.

The spelling of 51651983 in words is "fifty-one million, six hundred fifty-one thousand, nine hundred eighty-three".