51207970 has 32 divisors (see below), whose sum is σ = 103804416. Its totient is φ = 18019200.

The previous prime is 51207931. The next prime is 51207971. The reversal of 51207970 is 7970215.

51207970 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is not an unprimeable number, because it can be changed into a prime (51207971) 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 15 ways as a sum of consecutive naturals, for example, 4099 + ... + 10918.

It is an arithmetic number, because the mean of its divisors is an integer number (3243888).

Almost surely, 2^51207970 is an apocalyptic number.

51207970 is an abundant number, since it is smaller than the sum of its proper divisors (52596446).

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

51207970 is a wasteful number, since it uses less digits than its factorization.

51207970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15066.

The product of its (nonzero) digits is 4410, while the sum is 31.

The square root of 51207970 is about 7155.9744270085. The cubic root of 51207970 is about 371.3463731180.

The spelling of 51207970 in words is "fifty-one million, two hundred seven thousand, nine hundred seventy".