51453452240 has 40 divisors (see below), whose sum is σ = 120790745088. Its totient is φ = 20381558400.

The previous prime is 51453452233. The next prime is 51453452279. The reversal of 51453452240 is 4225435415.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×51453452240² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51453452240.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3113936 + ... + 3130415.

Almost surely, 2^51453452240 is an apocalyptic number.

It is an amenable number.

51453452240 is an abundant number, since it is smaller than the sum of its proper divisors (69337292848).

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

51453452240 is a wasteful number, since it uses less digits than its factorization.

51453452240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6244467 (or 6244461 counting only the distinct ones).

The product of its (nonzero) digits is 96000, while the sum is 35.

Adding to 51453452240 its reverse (4225435415), we get a palindrome (55678887655).

The spelling of 51453452240 in words is "fifty-one billion, four hundred fifty-three million, four hundred fifty-two thousand, two hundred forty".