51241020 has 24 divisors (see below), whose sum is σ = 143475024. Its totient is φ = 13664256.

The previous prime is 51241019. The next prime is 51241027. The reversal of 51241020 is 2014215.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51241027) 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, 426949 + ... + 427068.

It is an arithmetic number, because the mean of its divisors is an integer number (5978126).

Almost surely, 2^51241020 is an apocalyptic number.

It is an amenable number.

51241020 is an abundant number, since it is smaller than the sum of its proper divisors (92234004).

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

51241020 is a wasteful number, since it uses less digits than its factorization.

51241020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 854029 (or 854027 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 51241020 is about 7158.2833137562. The cubic root of 51241020 is about 371.4262458293.

Adding to 51241020 its reverse (2014215), we get a palindrome (53255235).

The spelling of 51241020 in words is "fifty-one million, two hundred forty-one thousand, twenty".