51055020 has 36 divisors (see below), whose sum is σ = 154867440. Its totient is φ = 13614624.

The previous prime is 51055013. The next prime is 51055027. The reversal of 51055020 is 2055015.

It is an interprime number because it is at equal distance from previous prime (51055013) and next prime (51055027).

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 = 51054984 and 51055002.

It is not an unprimeable number, because it can be changed into a prime (51055027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 141640 + ... + 141999.

Almost surely, 2^51055020 is an apocalyptic number.

It is an amenable number.

51055020 is an abundant number, since it is smaller than the sum of its proper divisors (103812420).

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

51055020 is a wasteful number, since it uses less digits than its factorization.

51055020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283654 (or 283649 counting only the distinct ones).

The product of its (nonzero) digits is 250, while the sum is 18.

The square root of 51055020 is about 7145.2795606610. The cubic root of 51055020 is about 370.9762870418.

The spelling of 51055020 in words is "fifty-one million, fifty-five thousand, twenty".