51011420 has 24 divisors (see below), whose sum is σ = 107730000. Its totient is φ = 20289152.

The previous prime is 51011417. The next prime is 51011423. The reversal of 51011420 is 2411015.

It is an interprime number because it is at equal distance from previous prime (51011417) and next prime (51011423).

It is a junction number, because it is equal to n+sod(n) for n = 51011395 and 51011404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51011423) 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, 3545 + ... + 10704.

It is an arithmetic number, because the mean of its divisors is an integer number (4488750).

Almost surely, 2^51011420 is an apocalyptic number.

It is an amenable number.

51011420 is an abundant number, since it is smaller than the sum of its proper divisors (56718580).

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

51011420 is a wasteful number, since it uses less digits than its factorization.

51011420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14437 (or 14435 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 14.

The square root of 51011420 is about 7142.2279437162. The cubic root of 51011420 is about 370.8706547745.

Adding to 51011420 its reverse (2411015), we get a palindrome (53422435).

The spelling of 51011420 in words is "fifty-one million, eleven thousand, four hundred twenty".