201573640 has 32 divisors (see below), whose sum is σ = 453962880. Its totient is φ = 80554432.

The previous prime is 201573623. The next prime is 201573653. The reversal of 201573640 is 46375102.

It is a junction number, because it is equal to n+sod(n) for n = 201573599 and 201573608.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65169 + ... + 68191.

It is an arithmetic number, because the mean of its divisors is an integer number (14186340).

Almost surely, 2^201573640 is an apocalyptic number.

201573640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201573640 is an abundant number, since it is smaller than the sum of its proper divisors (252389240).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

201573640 is a wasteful number, since it uses less digits than its factorization.

201573640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4701 (or 4697 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 201573640 is about 14197.6631880039. The cubic root of 201573640 is about 586.3333261871. Note that the first 4 decimals are identical.

The spelling of 201573640 in words is "two hundred one million, five hundred seventy-three thousand, six hundred forty".