140520215 has 32 divisors (see below), whose sum is σ = 196375104. Its totient is φ = 95395840.

The previous prime is 140520209. The next prime is 140520227. The reversal of 140520215 is 512025041.

It is not a de Polignac number, because 140520215 - 2⁴ = 140520199 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 127547 + ... + 128643.

It is an arithmetic number, because the mean of its divisors is an integer number (6136722).

Almost surely, 2^140520215 is an apocalyptic number.

140520215 is a deficient number, since it is larger than the sum of its proper divisors (55854889).

140520215 is a wasteful number, since it uses less digits than its factorization.

140520215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1267.

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 140520215 is about 11854.1222787687. The cubic root of 140520215 is about 519.8917612486.

Adding to 140520215 its reverse (512025041), we get a palindrome (652545256).

The spelling of 140520215 in words is "one hundred forty million, five hundred twenty thousand, two hundred fifteen".