51780914 has 4 divisors (see below), whose sum is σ = 77671374. Its totient is φ = 25890456.

The previous prime is 51780899. The next prime is 51780917. The reversal of 51780914 is 41908715.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 49773025 + 2007889 = 7055^2 + 1417^2 .

It is not an unprimeable number, because it can be changed into a prime (51780917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12945227 + ... + 12945230.

Almost surely, 2^51780914 is an apocalyptic number.

51780914 is a deficient number, since it is larger than the sum of its proper divisors (25890460).

51780914 is a wasteful number, since it uses less digits than its factorization.

51780914 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25890459.

The product of its (nonzero) digits is 10080, while the sum is 35.

The square root of 51780914 is about 7195.8956357079. The cubic root of 51780914 is about 372.7261848687.

The spelling of 51780914 in words is "fifty-one million, seven hundred eighty thousand, nine hundred fourteen".