2026431521 has 16 divisors (see below), whose sum is σ = 2148489360. Its totient is φ = 1908291840.

The previous prime is 2026431509. The next prime is 2026431541. The reversal of 2026431521 is 1251346202.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 621006400 + 1405425121 = 24920^2 + 37489^2 .

It is a cyclic number.

It is not a de Polignac number, because 2026431521 - 2¹⁴ = 2026415137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2026431541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 262091 + ... + 269711.

It is an arithmetic number, because the mean of its divisors is an integer number (134280585).

Almost surely, 2^2026431521 is an apocalyptic number.

It is an amenable number.

2026431521 is a deficient number, since it is larger than the sum of its proper divisors (122057839).

2026431521 is a wasteful number, since it uses less digits than its factorization.

2026431521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7876.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 2026431521 is about 45015.9029788363. The cubic root of 2026431521 is about 1265.4470491064.

Adding to 2026431521 its reverse (1251346202), we get a palindrome (3277777723).

The spelling of 2026431521 in words is "two billion, twenty-six million, four hundred thirty-one thousand, five hundred twenty-one".