201312481 has 8 divisors (see below), whose sum is σ = 208396800. Its totient is φ = 194265120.

The previous prime is 201312457. The next prime is 201312499. The reversal of 201312481 is 184213102.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 201312481 - 2¹⁵ = 201279713 is a prime.

It is a super-2 number, since 2×201312481² = 81053430012750722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201312401) 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, 2085 + ... + 20173.

It is an arithmetic number, because the mean of its divisors is an integer number (26049600).

Almost surely, 2^201312481 is an apocalyptic number.

It is an amenable number.

201312481 is a deficient number, since it is larger than the sum of its proper divisors (7084319).

201312481 is a wasteful number, since it uses less digits than its factorization.

201312481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18479.

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 201312481 is about 14188.4629541046. The cubic root of 201312481 is about 586.0799987465.

Adding to 201312481 its reverse (184213102), we get a palindrome (385525583).

The spelling of 201312481 in words is "two hundred one million, three hundred twelve thousand, four hundred eighty-one".