51201020 has 24 divisors (see below), whose sum is σ = 115793664. Its totient is φ = 18904896.

The previous prime is 51200987. The next prime is 51201047. The reversal of 51201020 is 2010215.

It is a junction number, because it is equal to n+sod(n) for n = 51200992 and 51201010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 98204 + ... + 98723.

It is an arithmetic number, because the mean of its divisors is an integer number (4824736).

Almost surely, 2^51201020 is an apocalyptic number.

It is an amenable number.

51201020 is an abundant number, since it is smaller than the sum of its proper divisors (64592644).

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

51201020 is a wasteful number, since it uses less digits than its factorization.

51201020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196949 (or 196947 counting only the distinct ones).

The product of its (nonzero) digits is 20, while the sum is 11.

The square root of 51201020 is about 7155.4888023111. The cubic root of 51201020 is about 371.3295725167.

Adding to 51201020 its reverse (2010215), we get a palindrome (53211235).

The spelling of 51201020 in words is "fifty-one million, two hundred one thousand, twenty".