201675621 has 12 divisors (see below), whose sum is σ = 312803232. Its totient is φ = 115243128.

The previous prime is 201675613. The next prime is 201675631. The reversal of 201675621 is 126576102.

It is not a de Polignac number, because 201675621 - 2³ = 201675613 is a prime.

It is a super-2 number, since 2×201675621² = 81346112211471282, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201675601) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 685825 + ... + 686118.

It is an arithmetic number, because the mean of its divisors is an integer number (26066936).

Almost surely, 2^201675621 is an apocalyptic number.

201675621 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

201675621 is a deficient number, since it is larger than the sum of its proper divisors (111127611).

201675621 is a wasteful number, since it uses less digits than its factorization.

201675621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1371960 (or 1371953 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 201675621 is about 14201.2542051750. The cubic root of 201675621 is about 586.4321896064.

The spelling of 201675621 in words is "two hundred one million, six hundred seventy-five thousand, six hundred twenty-one".