515211424040 has 16 divisors (see below), whose sum is σ = 1159225704180. Its totient is φ = 206084569600.

The previous prime is 515211424037. The next prime is 515211424061. The reversal of 515211424040 is 40424112515.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 471823367236 + 43388056804 = 686894^2 + 208298^2 .

It is a super-2 number, since 2×515211424040² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 515211423994 and 515211424012.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6440142761 + ... + 6440142840.

Almost surely, 2^515211424040 is an apocalyptic number.

It is an amenable number.

515211424040 is an abundant number, since it is smaller than the sum of its proper divisors (644014280140).

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

515211424040 is a wasteful number, since it uses less digits than its factorization.

515211424040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12880285612 (or 12880285608 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 29.

Adding to 515211424040 its reverse (40424112515), we get a palindrome (555635536555).

The spelling of 515211424040 in words is "five hundred fifteen billion, two hundred eleven million, four hundred twenty-four thousand, forty".