215401113 has 40 divisors (see below), whose sum is σ = 335624960. Its totient is φ = 137518560.

The previous prime is 215401103. The next prime is 215401117. The reversal of 215401113 is 311104512.

215401113 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 215401113 - 2⁴ = 215401097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (215401117) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 273306 + ... + 274092.

It is an arithmetic number, because the mean of its divisors is an integer number (8390624).

Almost surely, 2^215401113 is an apocalyptic number.

It is an amenable number.

215401113 is a deficient number, since it is larger than the sum of its proper divisors (120223847).

215401113 is a wasteful number, since it uses less digits than its factorization.

215401113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 939 (or 930 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 215401113 is about 14676.5497648460. The cubic root of 215401113 is about 599.4449617125. Note that the first 3 decimals are identical.

Adding to 215401113 its reverse (311104512), we get a palindrome (526505625).

The spelling of 215401113 in words is "two hundred fifteen million, four hundred one thousand, one hundred thirteen".