201331550 has 48 divisors (see below), whose sum is σ = 437114880. Its totient is φ = 67553760.

The previous prime is 201331517. The next prime is 201331567. The reversal of 201331550 is 55133102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10331 + ... + 22569.

It is an arithmetic number, because the mean of its divisors is an integer number (9106560).

Almost surely, 2^201331550 is an apocalyptic number.

201331550 is an abundant number, since it is smaller than the sum of its proper divisors (235783330).

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

201331550 is a wasteful number, since it uses less digits than its factorization.

201331550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12305 (or 12300 counting only the distinct ones).

The product of its (nonzero) digits is 450, while the sum is 20.

The square root of 201331550 is about 14189.1349278242. The cubic root of 201331550 is about 586.0985033230.

Adding to 201331550 its reverse (55133102), we get a palindrome (256464652).

The spelling of 201331550 in words is "two hundred one million, three hundred thirty-one thousand, five hundred fifty".