51780422 has 4 divisors (see below), whose sum is σ = 77670636. Its totient is φ = 25890210.

The previous prime is 51780409. The next prime is 51780473. The reversal of 51780422 is 22408715.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12945104 + ... + 12945107.

It is an arithmetic number, because the mean of its divisors is an integer number (19417659).

Almost surely, 2^51780422 is an apocalyptic number.

51780422 is a deficient number, since it is larger than the sum of its proper divisors (25890214).

51780422 is a wasteful number, since it uses less digits than its factorization.

51780422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25890213.

The product of its (nonzero) digits is 4480, while the sum is 29.

The square root of 51780422 is about 7195.8614494722. The cubic root of 51780422 is about 372.7250043703.

The spelling of 51780422 in words is "fifty-one million, seven hundred eighty thousand, four hundred twenty-two".