51420455 has 16 divisors (see below), whose sum is σ = 62705664. Its totient is φ = 40475040.

The previous prime is 51420449. The next prime is 51420463. The reversal of 51420455 is 55402415.

It is not a de Polignac number, because 51420455 - 2⁸ = 51420199 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 119090 + ... + 119520.

It is an arithmetic number, because the mean of its divisors is an integer number (3919104).

Almost surely, 2^51420455 is an apocalyptic number.

51420455 is a deficient number, since it is larger than the sum of its proper divisors (11285209).

51420455 is a wasteful number, since it uses less digits than its factorization.

51420455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 766.

The product of its (nonzero) digits is 4000, while the sum is 26.

The square root of 51420455 is about 7170.8057427321. The cubic root of 51420455 is about 371.8592922772.

The spelling of 51420455 in words is "fifty-one million, four hundred twenty thousand, four hundred fifty-five".