51780474 has 24 divisors (see below), whose sum is σ = 112473972. Its totient is φ = 17216640.

The previous prime is 51780473. The next prime is 51780479. The reversal of 51780474 is 47408715.

It can be written as a sum of positive squares in 2 ways, for example, as 36687249 + 15093225 = 6057^2 + 3885^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (51780473) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4162 + ... + 10994.

Almost surely, 2^51780474 is an apocalyptic number.

51780474 is an abundant number, since it is smaller than the sum of its proper divisors (60693498).

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

51780474 is a wasteful number, since it uses less digits than its factorization.

51780474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7262 (or 7259 counting only the distinct ones).

The product of its (nonzero) digits is 31360, while the sum is 36.

The square root of 51780474 is about 7195.8650626592. The cubic root of 51780474 is about 372.7251291388.

The spelling of 51780474 in words is "fifty-one million, seven hundred eighty thousand, four hundred seventy-four".