51272130 has 96 divisors (see below), whose sum is σ = 154211904. Its totient is φ = 10813824.

The previous prime is 51272107. The next prime is 51272149. The reversal of 51272130 is 3127215.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 51272097 and 51272106.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 17769 + ... + 20451.

It is an arithmetic number, because the mean of its divisors is an integer number (1606374).

Almost surely, 2^51272130 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51272130, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77105952).

51272130 is an abundant number, since it is smaller than the sum of its proper divisors (102939774).

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

51272130 is a wasteful number, since it uses less digits than its factorization.

51272130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2720 (or 2713 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 21.

The square root of 51272130 is about 7160.4559910665. The cubic root of 51272130 is about 371.5013987232.

Adding to 51272130 its reverse (3127215), we get a palindrome (54399345).

The spelling of 51272130 in words is "fifty-one million, two hundred seventy-two thousand, one hundred thirty".