51266388 has 24 divisors (see below), whose sum is σ = 120808800. Its totient is φ = 16919200.

The previous prime is 51266387. The next prime is 51266393. The reversal of 51266388 is 88366215.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51266381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19938 + ... + 22361.

It is an arithmetic number, because the mean of its divisors is an integer number (5033700).

Almost surely, 2^51266388 is an apocalyptic number.

It is an amenable number.

51266388 is an abundant number, since it is smaller than the sum of its proper divisors (69542412).

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

51266388 is a wasteful number, since it uses less digits than its factorization.

51266388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42407 (or 42405 counting only the distinct ones).

The product of its digits is 69120, while the sum is 39.

The square root of 51266388 is about 7160.0550277215. The cubic root of 51266388 is about 371.4875299758.

The spelling of 51266388 in words is "fifty-one million, two hundred sixty-six thousand, three hundred eighty-eight".