4001205523 has 8 divisors (see below), whose sum is σ = 4575559520. Its totient is φ = 3427539840.

The previous prime is 4001205517. The next prime is 4001205541. The reversal of 4001205523 is 3255021004.

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 4001205523 - 2⁹ = 4001205011 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4001205494 and 4001205503.

It is not an unprimeable number, because it can be changed into a prime (4001205503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 159558 + ... + 182923.

It is an arithmetic number, because the mean of its divisors is an integer number (571944940).

Almost surely, 2^4001205523 is an apocalyptic number.

4001205523 is a deficient number, since it is larger than the sum of its proper divisors (574353997).

4001205523 is a wasteful number, since it uses less digits than its factorization.

4001205523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344157.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 4001205523 is about 63255.0829815281. The cubic root of 4001205523 is about 1587.5605066569.

Adding to 4001205523 its reverse (3255021004), we get a palindrome (7256226527).

The spelling of 4001205523 in words is "four billion, one million, two hundred five thousand, five hundred twenty-three".