51067220 has 24 divisors (see below), whose sum is σ = 107414664. Its totient is φ = 20393856.

The previous prime is 51067213. The next prime is 51067241. The reversal of 51067220 is 2276015.

It can be written as a sum of positive squares in 4 ways, for example, as 22316176 + 28751044 = 4724^2 + 5362^2 .

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, 13454 + ... + 16826.

It is an arithmetic number, because the mean of its divisors is an integer number (4475611).

Almost surely, 2^51067220 is an apocalyptic number.

It is an amenable number.

51067220 is an abundant number, since it is smaller than the sum of its proper divisors (56347444).

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

51067220 is a wasteful number, since it uses less digits than its factorization.

51067220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4139 (or 4137 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 51067220 is about 7146.1332201408. The cubic root of 51067220 is about 371.0058339257.

It can be divided in two parts, 5 and 1067220, that multiplied together give a square (5336100 = 2310²).

The spelling of 51067220 in words is "fifty-one million, sixty-seven thousand, two hundred twenty".