201331398 has 16 divisors (see below), whose sum is σ = 416548080. Its totient is φ = 64796256.

The previous prime is 201331343. The next prime is 201331399. The reversal of 201331398 is 893133102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201331399) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 578365 + ... + 578712.

It is an arithmetic number, because the mean of its divisors is an integer number (26034255).

Almost surely, 2^201331398 is an apocalyptic number.

201331398 is an abundant number, since it is smaller than the sum of its proper divisors (215216682).

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

201331398 is a wasteful number, since it uses less digits than its factorization.

201331398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1157111.

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 201331398 is about 14189.1295716122. The cubic root of 201331398 is about 586.0983558267.

It can be divided in two parts, 2013 and 31398, that added together give a triangular number (33411 = T₂₅₈).

The spelling of 201331398 in words is "two hundred one million, three hundred thirty-one thousand, three hundred ninety-eight".