201451550 has 12 divisors (see below), whose sum is σ = 374699976. Its totient is φ = 80580600.

The previous prime is 201451531. The next prime is 201451553. The reversal of 201451550 is 55154102.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201451553) 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 5 ways as a sum of consecutive naturals, for example, 2014466 + ... + 2014565.

It is an arithmetic number, because the mean of its divisors is an integer number (31224998).

Almost surely, 2^201451550 is an apocalyptic number.

201451550 is a deficient number, since it is larger than the sum of its proper divisors (173248426).

201451550 is a wasteful number, since it uses less digits than its factorization.

201451550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4029043 (or 4029038 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 23.

The square root of 201451550 is about 14193.3628855180. The cubic root of 201451550 is about 586.2149246385.

The spelling of 201451550 in words is "two hundred one million, four hundred fifty-one thousand, five hundred fifty".