51072270 has 16 divisors (see below), whose sum is σ = 122573520. Its totient is φ = 13619264.

The previous prime is 51072269. The next prime is 51072289. The reversal of 51072270 is 7227015.

It is a self number, because there is not a number n which added to its sum of digits gives 51072270.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 851175 + ... + 851234.

It is an arithmetic number, because the mean of its divisors is an integer number (7660845).

Almost surely, 2^51072270 is an apocalyptic number.

51072270 is an abundant number, since it is smaller than the sum of its proper divisors (71501250).

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

51072270 is a wasteful number, since it uses less digits than its factorization.

51072270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1702419.

The product of its (nonzero) digits is 980, while the sum is 24.

The square root of 51072270 is about 7146.4865493472. The cubic root of 51072270 is about 371.0180630211.

Adding to 51072270 its reverse (7227015), we get a palindrome (58299285).

The spelling of 51072270 in words is "fifty-one million, seventy-two thousand, two hundred seventy".