531322401 has 4 divisors (see below), whose sum is σ = 708429872. Its totient is φ = 354214932.

The previous prime is 531322399. The next prime is 531322417. The reversal of 531322401 is 104223135.

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 not a de Polignac number, because 531322401 - 2¹ = 531322399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (531322201) 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, 88553731 + ... + 88553736.

It is an arithmetic number, because the mean of its divisors is an integer number (177107468).

Almost surely, 2^531322401 is an apocalyptic number.

It is an amenable number.

531322401 is a deficient number, since it is larger than the sum of its proper divisors (177107471).

531322401 is a wasteful number, since it uses less digits than its factorization.

531322401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177107470.

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

The square root of 531322401 is about 23050.4316879316. The cubic root of 531322401 is about 809.9397409828.

Adding to 531322401 its reverse (104223135), we get a palindrome (635545536).

The spelling of 531322401 in words is "five hundred thirty-one million, three hundred twenty-two thousand, four hundred one".