201131554456 has 16 divisors (see below), whose sum is σ = 430996188240. Its totient is φ = 86199237600.

The previous prime is 201131554427. The next prime is 201131554457. The reversal of 201131554456 is 654455131102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201131554457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1795817395 + ... + 1795817506.

It is an arithmetic number, because the mean of its divisors is an integer number (26937261765).

Almost surely, 2^201131554456 is an apocalyptic number.

It is an amenable number.

201131554456 is an abundant number, since it is smaller than the sum of its proper divisors (229864633784).

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

201131554456 is a wasteful number, since it uses less digits than its factorization.

201131554456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3591634914 (or 3591634910 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 37.

Adding to 201131554456 its reverse (654455131102), we get a palindrome (855586685558).

The spelling of 201131554456 in words is "two hundred one billion, one hundred thirty-one million, five hundred fifty-four thousand, four hundred fifty-six".