51420416 has 18 divisors (see below), whose sum is σ = 102640482. Its totient is φ = 25710080.

The previous prime is 51420407. The next prime is 51420419. The reversal of 51420416 is 61402415.

It can be written as a sum of positive squares in only one way, i.e., 43033600 + 8386816 = 6560^2 + 2896^2 .

It is a super-2 number, since 2×51420416² = 5288118363226112, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51420391 and 51420400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51420419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100175 + ... + 100686.

It is an arithmetic number, because the mean of its divisors is an integer number (5702249).

Almost surely, 2^51420416 is an apocalyptic number.

It is an amenable number.

51420416 is a deficient number, since it is larger than the sum of its proper divisors (51220066).

51420416 is an equidigital number, since it uses as much as digits as its factorization.

51420416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200877 (or 200863 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 51420416 is about 7170.8030233719. The cubic root of 51420416 is about 371.8591982646.

The spelling of 51420416 in words is "fifty-one million, four hundred twenty thousand, four hundred sixteen".