201423645 has 32 divisors (see below), whose sum is σ = 358992000. Its totient is φ = 107154432.

The previous prime is 201423631. The next prime is 201423659. The reversal of 201423645 is 546324102.

201423645 is a `hidden beast` number, since 2 + 0 + 14 + 2 + 3 + 645 = 666.

It is an interprime number because it is at equal distance from previous prime (201423631) and next prime (201423659).

It is not a de Polignac number, because 201423645 - 2⁵ = 201423613 is a prime.

It is a super-3 number, since 3×201423645³ (a number of 26 digits) contains 333 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 an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 58954 + ... + 62276.

It is an arithmetic number, because the mean of its divisors is an integer number (11218500).

Almost surely, 2^201423645 is an apocalyptic number.

It is an amenable number.

201423645 is a deficient number, since it is larger than the sum of its proper divisors (157568355).

201423645 is a wasteful number, since it uses less digits than its factorization.

201423645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3786 (or 3780 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 201423645 is about 14192.3798215803. The cubic root of 201423645 is about 586.1878559581.

Adding to 201423645 its reverse (546324102), we get a palindrome (747747747).

The spelling of 201423645 in words is "two hundred one million, four hundred twenty-three thousand, six hundred forty-five".