51102861 has 8 divisors (see below), whose sum is σ = 68172000. Its totient is φ = 34051152.

The previous prime is 51102859. The next prime is 51102893. The reversal of 51102861 is 16820115.

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

It is not a de Polignac number, because 51102861 - 2¹ = 51102859 is a prime.

It is a super-2 number, since 2×51102861² = 5223004804770642, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51102841) 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, 6015 + ... + 11763.

It is an arithmetic number, because the mean of its divisors is an integer number (8521500).

Almost surely, 2^51102861 is an apocalyptic number.

It is an amenable number.

51102861 is a deficient number, since it is larger than the sum of its proper divisors (17069139).

51102861 is a wasteful number, since it uses less digits than its factorization.

51102861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8715.

The product of its (nonzero) digits is 480, while the sum is 24.

The square root of 51102861 is about 7148.6265114356. The cubic root of 51102861 is about 371.0921250528.

Adding to 51102861 its reverse (16820115), we get a palindrome (67922976).

The spelling of 51102861 in words is "fifty-one million, one hundred two thousand, eight hundred sixty-one".