51406772 has 12 divisors (see below), whose sum is σ = 90104196. Its totient is φ = 25662720.

The previous prime is 51406741. The next prime is 51406781. The reversal of 51406772 is 27760415.

It can be written as a sum of positive squares in 2 ways, for example, as 35117476 + 16289296 = 5926^2 + 4036^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7229 + ... + 12452.

It is an arithmetic number, because the mean of its divisors is an integer number (7508683).

Almost surely, 2^51406772 is an apocalyptic number.

It is an amenable number.

51406772 is a deficient number, since it is larger than the sum of its proper divisors (38697424).

51406772 is a wasteful number, since it uses less digits than its factorization.

51406772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20338 (or 20336 counting only the distinct ones).

The product of its (nonzero) digits is 11760, while the sum is 32.

The square root of 51406772 is about 7169.8516023695. The cubic root of 51406772 is about 371.8263053911.

The spelling of 51406772 in words is "fifty-one million, four hundred six thousand, seven hundred seventy-two".