201431523 has 8 divisors (see below), whose sum is σ = 269246736. Its totient is φ = 133952000.

The previous prime is 201431509. The next prime is 201431533. The reversal of 201431523 is 325134102.

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 201431523 - 2¹² = 201427427 is a prime.

It is a zygodrome in base 2.

It is a self number, because there is not a number n which added to its sum of digits gives 201431523.

It is not an unprimeable number, because it can be changed into a prime (201431533) 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, 82518 + ... + 84923.

It is an arithmetic number, because the mean of its divisors is an integer number (33655842).

Almost surely, 2^201431523 is an apocalyptic number.

201431523 is a deficient number, since it is larger than the sum of its proper divisors (67815213).

201431523 is a wasteful number, since it uses less digits than its factorization.

201431523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167845.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 201431523 is about 14192.6573621715. The cubic root of 201431523 is about 586.1954981058.

Adding to 201431523 its reverse (325134102), we get a palindrome (526565625).

The spelling of 201431523 in words is "two hundred one million, four hundred thirty-one thousand, five hundred twenty-three".