201545001 has 12 divisors (see below), whose sum is σ = 332709312. Its totient is φ = 115168536.

The previous prime is 201544991. The next prime is 201545009. The reversal of 201545001 is 100545102.

It is not a de Polignac number, because 201545001 - 2⁵ = 201544969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (201545009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1599501 + ... + 1599626.

It is an arithmetic number, because the mean of its divisors is an integer number (27725776).

Almost surely, 2^201545001 is an apocalyptic number.

201545001 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

201545001 is a deficient number, since it is larger than the sum of its proper divisors (131164311).

201545001 is a wasteful number, since it uses less digits than its factorization.

201545001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3199140 (or 3199137 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 201545001 is about 14196.6545707078. The cubic root of 201545001 is about 586.3055566906.

The spelling of 201545001 in words is "two hundred one million, five hundred forty-five thousand, one".