431311221030 has 128 divisors (see below), whose sum is σ = 1073879285760. Its totient is φ = 110795511680.

The previous prime is 431311221023. The next prime is 431311221031. The reversal of 431311221030 is 30122113134.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 431311220988 and 431311221006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (431311221031) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 64767841 + ... + 64774499.

It is an arithmetic number, because the mean of its divisors is an integer number (8389681920).

Almost surely, 2^431311221030 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 431311221030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (536939642880).

431311221030 is an abundant number, since it is smaller than the sum of its proper divisors (642568064730).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

431311221030 is a wasteful number, since it uses less digits than its factorization.

431311221030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7434.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 431311221030 its reverse (30122113134), we get a palindrome (461433334164).

The spelling of 431311221030 in words is "four hundred thirty-one billion, three hundred eleven million, two hundred twenty-one thousand, thirty".