1232530521511 has 32 divisors (see below), whose sum is σ = 1367745619968. Its totient is φ = 1105441413120.

The previous prime is 1232530521499. The next prime is 1232530521583. The reversal of 1232530521511 is 1151250352321.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1232530521511 - 2¹¹ = 1232530519463 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1232530521611) 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, 133922436 + ... + 133931638.

It is an arithmetic number, because the mean of its divisors is an integer number (42742050624).

Almost surely, 2^{1232530521511} is an apocalyptic number.

1232530521511 is a deficient number, since it is larger than the sum of its proper divisors (135215098457).

1232530521511 is a wasteful number, since it uses less digits than its factorization.

1232530521511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13111.

The product of its (nonzero) digits is 9000, while the sum is 31.

Adding to 1232530521511 its reverse (1151250352321), we get a palindrome (2383780873832).

The spelling of 1232530521511 in words is "one trillion, two hundred thirty-two billion, five hundred thirty million, five hundred twenty-one thousand, five hundred eleven".