1225322544531 has 4 divisors (see below), whose sum is σ = 1633763392712. Its totient is φ = 816881696352.

The previous prime is 1225322544527. The next prime is 1225322544559. The reversal of 1225322544531 is 1354452235221.

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

It is not a de Polignac number, because 1225322544531 - 2² = 1225322544527 is a prime.

It is a super-2 number, since 2×1225322544531² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1225322544531.

It is not an unprimeable number, because it can be changed into a prime (1225322544521) 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, 204220424086 + ... + 204220424091.

It is an arithmetic number, because the mean of its divisors is an integer number (408440848178).

Almost surely, 2^{1225322544531} is an apocalyptic number.

1225322544531 is a deficient number, since it is larger than the sum of its proper divisors (408440848181).

1225322544531 is an equidigital number, since it uses as much as digits as its factorization.

1225322544531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408440848180.

The product of its digits is 288000, while the sum is 39.

Adding to 1225322544531 its reverse (1354452235221), we get a palindrome (2579774779752).

The spelling of 1225322544531 in words is "one trillion, two hundred twenty-five billion, three hundred twenty-two million, five hundred forty-four thousand, five hundred thirty-one".