515122420040 has 32 divisors (see below), whose sum is σ = 1172048211000. Its totient is φ = 203733809664.

The previous prime is 515122420037. The next prime is 515122420069. The reversal of 515122420040 is 40024221515.

It can be written as a sum of positive squares in 4 ways, for example, as 369364924516 + 145757495524 = 607754^2 + 381782^2 .

It is a super-2 number, since 2×515122420040² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 515122419991 and 515122420009.

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, 72345095 + ... + 72352214.

Almost surely, 2^515122420040 is an apocalyptic number.

It is an amenable number.

515122420040 is an abundant number, since it is smaller than the sum of its proper divisors (656925790960).

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

515122420040 is a wasteful number, since it uses less digits than its factorization.

515122420040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144697409 (or 144697405 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 26.

Adding to 515122420040 its reverse (40024221515), we get a palindrome (555146641555).

The spelling of 515122420040 in words is "five hundred fifteen billion, one hundred twenty-two million, four hundred twenty thousand, forty".