51135301400240 has 40 divisors (see below), whose sum is σ = 119576798769168. Its totient is φ = 20335888643840.

The previous prime is 51135301400237. The next prime is 51135301400269. The reversal of 51135301400240 is 4200410353115.

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

It is a super-2 number, since 2×51135301400240² (a number of 28 digits) contains 22 as substring.

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, 1847359766 + ... + 1847387445.

Almost surely, 2^{51135301400240} is an apocalyptic number.

It is an amenable number.

51135301400240 is an abundant number, since it is smaller than the sum of its proper divisors (68441497368928).

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

51135301400240 is a wasteful number, since it uses less digits than its factorization.

51135301400240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3694747397 (or 3694747391 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 29.

Adding to 51135301400240 its reverse (4200410353115), we get a palindrome (55335711753355).

The spelling of 51135301400240 in words is "fifty-one trillion, one hundred thirty-five billion, three hundred one million, four hundred thousand, two hundred forty".