1515140140 has 48 divisors (see below), whose sum is σ = 3213048384. Its totient is φ = 600134400.

The previous prime is 1515140093. The next prime is 1515140141. The reversal of 1515140140 is 410415151.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1515140141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1001985 + ... + 1003495.

It is an arithmetic number, because the mean of its divisors is an integer number (66938508).

Almost surely, 2^1515140140 is an apocalyptic number.

1515140140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1515140140 is an abundant number, since it is smaller than the sum of its proper divisors (1697908244).

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

1515140140 is a wasteful number, since it uses less digits than its factorization.

1515140140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1978 (or 1976 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 22.

The square root of 1515140140 is about 38924.8010913351. The cubic root of 1515140140 is about 1148.5527199986.

Adding to 1515140140 its reverse (410415151), we get a palindrome (1925555291).

The spelling of 1515140140 in words is "one billion, five hundred fifteen million, one hundred forty thousand, one hundred forty".