51453340 has 12 divisors (see below), whose sum is σ = 108052056. Its totient is φ = 20581328.

The previous prime is 51453331. The next prime is 51453343. The reversal of 51453340 is 4335415.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51453343) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1286314 + ... + 1286353.

It is an arithmetic number, because the mean of its divisors is an integer number (9004338).

Almost surely, 2^51453340 is an apocalyptic number.

It is an amenable number.

51453340 is an abundant number, since it is smaller than the sum of its proper divisors (56598716).

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

51453340 is a wasteful number, since it uses less digits than its factorization.

51453340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2572676 (or 2572674 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 51453340 is about 7173.0983542678. The cubic root of 51453340 is about 371.9385472929.

Adding to 51453340 its reverse (4335415), we get a palindrome (55788755).

The spelling of 51453340 in words is "fifty-one million, four hundred fifty-three thousand, three hundred forty".