201450551 has 4 divisors (see below), whose sum is σ = 201576600. Its totient is φ = 201324504.

The previous prime is 201450541. The next prime is 201450563. The reversal of 201450551 is 155054102.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201450551 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201450541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60596 + ... + 63833.

It is an arithmetic number, because the mean of its divisors is an integer number (50394150).

Almost surely, 2^201450551 is an apocalyptic number.

201450551 is a deficient number, since it is larger than the sum of its proper divisors (126049).

201450551 is a wasteful number, since it uses less digits than its factorization.

201450551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126048.

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

The square root of 201450551 is about 14193.3276929690. The cubic root of 201450551 is about 586.2139556219.

The spelling of 201450551 in words is "two hundred one million, four hundred fifty thousand, five hundred fifty-one".