51781362 has 16 divisors (see below), whose sum is σ = 103753440. Its totient is φ = 17228672.

The previous prime is 51781361. The next prime is 51781381. The reversal of 51781362 is 26318715.

It is not an unprimeable number, because it can be changed into a prime (51781361) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4287 + ... + 11042.

It is an arithmetic number, because the mean of its divisors is an integer number (6484590).

Almost surely, 2^51781362 is an apocalyptic number.

51781362 is an abundant number, since it is smaller than the sum of its proper divisors (51972078).

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

51781362 is a wasteful number, since it uses less digits than its factorization.

51781362 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15897.

The product of its digits is 10080, while the sum is 33.

The square root of 51781362 is about 7195.9267644967. The cubic root of 51781362 is about 372.7272597876.

The spelling of 51781362 in words is "fifty-one million, seven hundred eighty-one thousand, three hundred sixty-two".