51060420 has 36 divisors (see below), whose sum is σ = 154883820. Its totient is φ = 13616064.

The previous prime is 51060419. The next prime is 51060421. The reversal of 51060420 is 2406015.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (51060419) and next prime (51060421).

It can be written as a sum of positive squares in 2 ways, for example, as 15634116 + 35426304 = 3954^2 + 5952^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 51060393 and 51060402.

It is not an unprimeable number, because it can be changed into a prime (51060421) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 141655 + ... + 142014.

Almost surely, 2^51060420 is an apocalyptic number.

It is an amenable number.

51060420 is an abundant number, since it is smaller than the sum of its proper divisors (103823400).

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

51060420 is a wasteful number, since it uses less digits than its factorization.

51060420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283684 (or 283679 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 51060420 is about 7145.6574225189. The cubic root of 51060420 is about 370.9893657513.

Adding to 51060420 its reverse (2406015), we get a palindrome (53466435).

The spelling of 51060420 in words is "fifty-one million, sixty thousand, four hundred twenty".