51261102 has 12 divisors (see below), whose sum is σ = 111065760. Its totient is φ = 17087028.

The previous prime is 51261083. The next prime is 51261109. The reversal of 51261102 is 20116215.

51261102 is a `hidden beast` number, since 51 + 2 + 611 + 0 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 2847839 = 51261102 / (5 + 1 + 2 + 6 + 1 + 1 + 0 + 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51261109) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1423902 + ... + 1423937.

It is an arithmetic number, because the mean of its divisors is an integer number (9255480).

Almost surely, 2^51261102 is an apocalyptic number.

51261102 is an abundant number, since it is smaller than the sum of its proper divisors (59804658).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51261102 is a wasteful number, since it uses less digits than its factorization.

51261102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2847847 (or 2847844 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 51261102 is about 7159.6858869646. The cubic root of 51261102 is about 371.4747616971.

Adding to 51261102 its reverse (20116215), we get a palindrome (71377317).

The spelling of 51261102 in words is "fifty-one million, two hundred sixty-one thousand, one hundred two".