51309356 has 12 divisors (see below), whose sum is σ = 102618768. Its totient is φ = 21989712.

The previous prime is 51309341. The next prime is 51309359. The reversal of 51309356 is 65390315.

51309356 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (51309359) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 916211 + ... + 916266.

It is an arithmetic number, because the mean of its divisors is an integer number (8551564).

Almost surely, 2^51309356 is an apocalyptic number.

It is an amenable number.

51309356 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

51309356 is a wasteful number, since it uses less digits than its factorization.

51309356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1832488 (or 1832486 counting only the distinct ones).

The product of its (nonzero) digits is 12150, while the sum is 32.

The square root of 51309356 is about 7163.0549348724. The cubic root of 51309356 is about 371.5912861888.

The spelling of 51309356 in words is "fifty-one million, three hundred nine thousand, three hundred fifty-six".