51938169 has 8 divisors (see below), whose sum is σ = 69666240. Its totient is φ = 34417776.

The previous prime is 51938167. The next prime is 51938171. The reversal of 51938169 is 96183915.

It is an interprime number because it is at equal distance from previous prime (51938167) and next prime (51938171).

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

It is not a de Polignac number, because 51938169 - 2¹ = 51938167 is a prime.

It is a super-2 number, since 2×51938169² = 5395146798145122, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 51938169.

It is not an unprimeable number, because it can be changed into a prime (51938167) 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, 51334 + ... + 52335.

It is an arithmetic number, because the mean of its divisors is an integer number (8708280).

Almost surely, 2^51938169 is an apocalyptic number.

It is an amenable number.

51938169 is a deficient number, since it is larger than the sum of its proper divisors (17728071).

51938169 is a wasteful number, since it uses less digits than its factorization.

51938169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103839.

The product of its digits is 58320, while the sum is 42.

The square root of 51938169 is about 7206.8140672561. The cubic root of 51938169 is about 373.1031179702.

The spelling of 51938169 in words is "fifty-one million, nine hundred thirty-eight thousand, one hundred sixty-nine".