1025220442531 has 4 divisors (see below), whose sum is σ = 1025226882064. Its totient is φ = 1025214003000.

The previous prime is 1025220442529. The next prime is 1025220442577. The reversal of 1025220442531 is 1352440225201.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1025220442531 - 2¹ = 1025220442529 is a prime.

It is a super-2 number, since 2×1025220442531² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1025220442493 and 1025220442502.

It is not an unprimeable number, because it can be changed into a prime (1025220442031) 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, 2974740 + ... + 3301441.

It is an arithmetic number, because the mean of its divisors is an integer number (256306720516).

Almost surely, 2^{1025220442531} is an apocalyptic number.

1025220442531 is a deficient number, since it is larger than the sum of its proper divisors (6439533).

1025220442531 is an equidigital number, since it uses as much as digits as its factorization.

1025220442531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6439532.

The product of its (nonzero) digits is 19200, while the sum is 31.

Adding to 1025220442531 its reverse (1352440225201), we get a palindrome (2377660667732).

The spelling of 1025220442531 in words is "one trillion, twenty-five billion, two hundred twenty million, four hundred forty-two thousand, five hundred thirty-one".