201511413 has 6 divisors (see below), whose sum is σ = 291072054. Its totient is φ = 134340936.

The previous prime is 201511403. The next prime is 201511447. The reversal of 201511413 is 314115102.

201511413 is a `hidden beast` number, since 201 + 51 + 1 + 413 = 666.

It can be written as a sum of positive squares in only one way, i.e., 182169009 + 19342404 = 13497^2 + 4398^2 .

It is not a de Polignac number, because 201511413 - 2¹⁶ = 201445877 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201511403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11195070 + ... + 11195087.

It is an arithmetic number, because the mean of its divisors is an integer number (48512009).

Almost surely, 2^201511413 is an apocalyptic number.

It is an amenable number.

201511413 is a deficient number, since it is larger than the sum of its proper divisors (89560641).

201511413 is a wasteful number, since it uses less digits than its factorization.

201511413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22390163 (or 22390160 counting only the distinct ones).

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

The square root of 201511413 is about 14195.4715666652. The cubic root of 201511413 is about 586.2729850978.

Adding to 201511413 its reverse (314115102), we get a palindrome (515626515).

The spelling of 201511413 in words is "two hundred one million, five hundred eleven thousand, four hundred thirteen".