431145121 has 4 divisors (see below), whose sum is σ = 470340144. Its totient is φ = 391950100.

The previous prime is 431145101. The next prime is 431145139. The reversal of 431145121 is 121541134.

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 not a de Polignac number, because 431145121 - 2¹⁹ = 430620833 is a prime.

It is a super-2 number, since 2×431145121² = 371772230724209282, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 431145092 and 431145101.

It is not an unprimeable number, because it can be changed into a prime (431145101) 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, 19597495 + ... + 19597516.

It is an arithmetic number, because the mean of its divisors is an integer number (117585036).

Almost surely, 2^431145121 is an apocalyptic number.

It is an amenable number.

431145121 is a deficient number, since it is larger than the sum of its proper divisors (39195023).

431145121 is a wasteful number, since it uses less digits than its factorization.

431145121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39195022.

The product of its digits is 480, while the sum is 22.

The square root of 431145121 is about 20764.0343141693. The cubic root of 431145121 is about 755.4536524821.

Adding to 431145121 its reverse (121541134), we get a palindrome (552686255).

The spelling of 431145121 in words is "four hundred thirty-one million, one hundred forty-five thousand, one hundred twenty-one".