515212140 has 24 divisors (see below), whose sum is σ = 1442594160. Its totient is φ = 137389888.

The previous prime is 515212133. The next prime is 515212141. The reversal of 515212140 is 41212515.

It is not an unprimeable number, because it can be changed into a prime (515212141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4293375 + ... + 4293494.

It is an arithmetic number, because the mean of its divisors is an integer number (60108090).

Almost surely, 2^515212140 is an apocalyptic number.

It is an amenable number.

515212140 is an abundant number, since it is smaller than the sum of its proper divisors (927382020).

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

515212140 is a wasteful number, since it uses less digits than its factorization.

515212140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8586881 (or 8586879 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 21.

The square root of 515212140 is about 22698.2849572385. The cubic root of 515212140 is about 801.6695031089.

Adding to 515212140 its reverse (41212515), we get a palindrome (556424655).

The spelling of 515212140 in words is "five hundred fifteen million, two hundred twelve thousand, one hundred forty".