512540140 has 48 divisors (see below), whose sum is σ = 1302460992. Its totient is φ = 165390336.

The previous prime is 512540131. The next prime is 512540209. The reversal of 512540140 is 41045215.

It is a super-2 number, since 2×512540140² = 525394790222439200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 105297 + ... + 110056.

It is an arithmetic number, because the mean of its divisors is an integer number (27134604).

Almost surely, 2^512540140 is an apocalyptic number.

It is an amenable number.

512540140 is an abundant number, since it is smaller than the sum of its proper divisors (789920852).

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

512540140 is a wasteful number, since it uses less digits than its factorization.

512540140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215386 (or 215384 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 512540140 is about 22639.3493722766. The cubic root of 512540140 is about 800.2812240464.

Adding to 512540140 its reverse (41045215), we get a palindrome (553585355).

The spelling of 512540140 in words is "five hundred twelve million, five hundred forty thousand, one hundred forty".