201563613 has 16 divisors (see below), whose sum is σ = 299597760. Its totient is φ = 133932528.

The previous prime is 201563599. The next prime is 201563623. The reversal of 201563613 is 316365102.

201563613 is a `hidden beast` number, since 2 + 0 + 15 + 636 + 13 = 666.

It is not a de Polignac number, because 201563613 - 2¹⁸ = 201301469 is a prime.

It is a super-2 number, since 2×201563613² = 81255780171227538, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201563623) 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, 3870 + ... + 20447.

It is an arithmetic number, because the mean of its divisors is an integer number (18724860).

Almost surely, 2^201563613 is an apocalyptic number.

It is an amenable number.

201563613 is a deficient number, since it is larger than the sum of its proper divisors (98034147).

201563613 is a wasteful number, since it uses less digits than its factorization.

201563613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24633 (or 24627 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 201563613 is about 14197.3100621209. The cubic root of 201563613 is about 586.3236039143.

The spelling of 201563613 in words is "two hundred one million, five hundred sixty-three thousand, six hundred thirteen".