1223541501 has 16 divisors (see below), whose sum is σ = 2007863424. Its totient is φ = 645384384.

The previous prime is 1223541497. The next prime is 1223541503. The reversal of 1223541501 is 1051453221.

It is a happy number.

It is not a de Polignac number, because 1223541501 - 2² = 1223541497 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223541503) 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, 2240646 + ... + 2241191.

It is an arithmetic number, because the mean of its divisors is an integer number (125491464).

Almost surely, 2^1223541501 is an apocalyptic number.

It is an amenable number.

1223541501 is a deficient number, since it is larger than the sum of its proper divisors (784321923).

1223541501 is a wasteful number, since it uses less digits than its factorization.

1223541501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4481860.

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 1223541501 is about 34979.1580944996. The cubic root of 1223541501 is about 1069.5626654830.

Adding to 1223541501 its reverse (1051453221), we get a palindrome (2274994722).

The spelling of 1223541501 in words is "one billion, two hundred twenty-three million, five hundred forty-one thousand, five hundred one".