51773240 has 32 divisors (see below), whose sum is σ = 117149760. Its totient is φ = 20592000.

The previous prime is 51773237. The next prime is 51773243. The reversal of 51773240 is 4237715.

It is an interprime number because it is at equal distance from previous prime (51773237) and next prime (51773243).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51773243) 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, 3665 + ... + 10815.

It is an arithmetic number, because the mean of its divisors is an integer number (3660930).

Almost surely, 2^51773240 is an apocalyptic number.

It is an amenable number.

51773240 is an abundant number, since it is smaller than the sum of its proper divisors (65376520).

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

51773240 is a wasteful number, since it uses less digits than its factorization.

51773240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7343 (or 7339 counting only the distinct ones).

The product of its (nonzero) digits is 5880, while the sum is 29.

The square root of 51773240 is about 7195.3623953210. The cubic root of 51773240 is about 372.7077711211.

The spelling of 51773240 in words is "fifty-one million, seven hundred seventy-three thousand, two hundred forty".