201554145 has 48 divisors (see below), whose sum is σ = 379688400. Its totient is φ = 98316288.

The previous prime is 201554063. The next prime is 201554153. The reversal of 201554145 is 541455102.

It can be written as a sum of positive squares in 8 ways, for example, as 107308881 + 94245264 = 10359^2 + 9708^2 .

It is not a de Polignac number, because 201554145 - 2⁹ = 201553633 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 64581 + ... + 67629.

It is an arithmetic number, because the mean of its divisors is an integer number (7910175).

Almost surely, 2^201554145 is an apocalyptic number.

It is an amenable number.

201554145 is a deficient number, since it is larger than the sum of its proper divisors (178134255).

201554145 is a wasteful number, since it uses less digits than its factorization.

201554145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3186 (or 3183 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 27.

The square root of 201554145 is about 14196.9766147585. The cubic root of 201554145 is about 586.3144233571.

The spelling of 201554145 in words is "two hundred one million, five hundred fifty-four thousand, one hundred forty-five".