523440231401 has 4 divisors (see below), whose sum is σ = 523443326592. Its totient is φ = 523437136212.

The previous prime is 523440231383. The next prime is 523440231421. The reversal of 523440231401 is 104132044325.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-523440231401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (523440231421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1278305 + ... + 1637358.

It is an arithmetic number, because the mean of its divisors is an integer number (130860831648).

Almost surely, 2^523440231401 is an apocalyptic number.

It is an amenable number.

523440231401 is a deficient number, since it is larger than the sum of its proper divisors (3095191).

523440231401 is a wasteful number, since it uses less digits than its factorization.

523440231401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3095190.

The product of its (nonzero) digits is 11520, while the sum is 29.

Adding to 523440231401 its reverse (104132044325), we get a palindrome (627572275726).

The spelling of 523440231401 in words is "five hundred twenty-three billion, four hundred forty million, two hundred thirty-one thousand, four hundred one".