51020655 has 64 divisors (see below), whose sum is σ = 100113408. Its totient is φ = 21657600.

The previous prime is 51020653. The next prime is 51020677. The reversal of 51020655 is 55602015.

51020655 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51020655 - 2¹ = 51020653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51020653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 180144 + ... + 180426.

It is an arithmetic number, because the mean of its divisors is an integer number (1564272).

Almost surely, 2^51020655 is an apocalyptic number.

51020655 is a deficient number, since it is larger than the sum of its proper divisors (49092753).

51020655 is a wasteful number, since it uses less digits than its factorization.

51020655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416.

The product of its (nonzero) digits is 1500, while the sum is 24.

The square root of 51020655 is about 7142.8744214077. The cubic root of 51020655 is about 370.8930339714.

The spelling of 51020655 in words is "fifty-one million, twenty thousand, six hundred fifty-five".