201431154 has 16 divisors (see below), whose sum is σ = 403439040. Its totient is φ = 67047600.

The previous prime is 201431137. The next prime is 201431159. The reversal of 201431154 is 451134102.

It is a self number, because there is not a number n which added to its sum of digits gives 201431154.

It is not an unprimeable number, because it can be changed into a prime (201431159) 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, 19422 + ... + 27929.

It is an arithmetic number, because the mean of its divisors is an integer number (25214940).

Almost surely, 2^201431154 is an apocalyptic number.

201431154 is an abundant number, since it is smaller than the sum of its proper divisors (202007886).

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

201431154 is a wasteful number, since it uses less digits than its factorization.

201431154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48065.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 201431154 is about 14192.6443624858. The cubic root of 201431154 is about 586.1951401574.

Adding to 201431154 its reverse (451134102), we get a palindrome (652565256).

The spelling of 201431154 in words is "two hundred one million, four hundred thirty-one thousand, one hundred fifty-four".