1225531234045 has 16 divisors (see below), whose sum is σ = 1524500206848. Its totient is φ = 945011793600.

The previous prime is 1225531234009. The next prime is 1225531234049. The reversal of 1225531234045 is 5404321355221.

It is a happy number.

It is not a de Polignac number, because 1225531234045 - 2²⁵ = 1225497679613 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1225531233995 and 1225531234013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225531234049) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30935781 + ... + 30975370.

It is an arithmetic number, because the mean of its divisors is an integer number (95281262928).

Almost surely, 2^{1225531234045} is an apocalyptic number.

It is an amenable number.

1225531234045 is a deficient number, since it is larger than the sum of its proper divisors (298968972803).

1225531234045 is a wasteful number, since it uses less digits than its factorization.

1225531234045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61911300.

The product of its (nonzero) digits is 144000, while the sum is 37.

Adding to 1225531234045 its reverse (5404321355221), we get a palindrome (6629852589266).

The spelling of 1225531234045 in words is "one trillion, two hundred twenty-five billion, five hundred thirty-one million, two hundred thirty-four thousand, forty-five".