1545513222 has 64 divisors (see below), whose sum is σ = 3454504704. Its totient is φ = 457021440.

The previous prime is 1545513169. The next prime is 1545513223. The reversal of 1545513222 is 2223155451.

It is a super-2 number, since 2×1545513222² = 4777222238753642568, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1545513222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1545513223) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 465693 + ... + 468999.

It is an arithmetic number, because the mean of its divisors is an integer number (53976636).

Almost surely, 2^1545513222 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1545513222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1727252352).

1545513222 is an abundant number, since it is smaller than the sum of its proper divisors (1908991482).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1545513222 is a wasteful number, since it uses less digits than its factorization.

1545513222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3493.

The product of its digits is 12000, while the sum is 30.

The square root of 1545513222 is about 39313.0159362011. The cubic root of 1545513222 is about 1156.1767763048.

Adding to 1545513222 its reverse (2223155451), we get a palindrome (3768668673).

The spelling of 1545513222 in words is "one billion, five hundred forty-five million, five hundred thirteen thousand, two hundred twenty-two".