201554149 has 4 divisors (see below), whose sum is σ = 201594636. Its totient is φ = 201513664.

The previous prime is 201554063. The next prime is 201554153. The reversal of 201554149 is 941455102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 69189124 + 132365025 = 8318^2 + 11505^2 .

It is a cyclic number.

It is not a de Polignac number, because 201554149 - 2⁷ = 201554021 is a prime.

It is a super-2 number, since 2×201554149² = 81248149958228402, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 201554149.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201554449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11524 + ... + 23149.

It is an arithmetic number, because the mean of its divisors is an integer number (50398659).

Almost surely, 2^201554149 is an apocalyptic number.

It is an amenable number.

201554149 is a deficient number, since it is larger than the sum of its proper divisors (40487).

201554149 is an equidigital number, since it uses as much as digits as its factorization.

201554149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40486.

The product of its (nonzero) digits is 7200, while the sum is 31.

The square root of 201554149 is about 14196.9767556336. The cubic root of 201554149 is about 586.3144272358.

The spelling of 201554149 in words is "two hundred one million, five hundred fifty-four thousand, one hundred forty-nine".