5311631520 has 144 divisors (see below), whose sum is σ = 19520314632. Its totient is φ = 1307473920.

The previous prime is 5311631513. The next prime is 5311631531. The reversal of 5311631520 is 251361135.

5311631520 is a `hidden beast` number, since 5 + 3 + 1 + 1 + 631 + 5 + 20 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1681328016 + 3630303504 = 41004^2 + 60252^2 .

It is a tau number, because it is divible by the number of its divisors (144).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 123151 + ... + 160590.

Almost surely, 2^5311631520 is an apocalyptic number.

It is an amenable number.

5311631520 is an abundant number, since it is smaller than the sum of its proper divisors (14208683112).

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

5311631520 is a wasteful number, since it uses less digits than its factorization.

5311631520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283775 (or 283764 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 27.

The square root of 5311631520 is about 72880.9407184073. The cubic root of 5311631520 is about 1744.7879228749.

Adding to 5311631520 its reverse (251361135), we get a palindrome (5562992655).

The spelling of 5311631520 in words is "five billion, three hundred eleven million, six hundred thirty-one thousand, five hundred twenty".