201945816 has 48 divisors (see below), whose sum is σ = 547770600. Its totient is φ = 67212672.

The previous prime is 201945769. The next prime is 201945823. The reversal of 201945816 is 618549102.

It is a super-2 number, since 2×201945816² = 81564225199811712, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 56515 + ... + 59981.

Almost surely, 2^201945816 is an apocalyptic number.

It is an amenable number.

201945816 is an abundant number, since it is smaller than the sum of its proper divisors (345824784).

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

201945816 is a wasteful number, since it uses less digits than its factorization.

201945816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4288 (or 4281 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 201945816 is about 14210.7640892388. The cubic root of 201945816 is about 586.6939636633.

The spelling of 201945816 in words is "two hundred one million, nine hundred forty-five thousand, eight hundred sixteen".