12513551 has 4 divisors (see below), whose sum is σ = 12532104. Its totient is φ = 12495000.

The previous prime is 12513517. The next prime is 12513563. The reversal of 12513551 is 15531521.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 12513551 - 2¹⁴ = 12497167 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12513451) 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, 8225 + ... + 9626.

It is an arithmetic number, because the mean of its divisors is an integer number (3133026).

Almost surely, 2^12513551 is an apocalyptic number.

12513551 is a deficient number, since it is larger than the sum of its proper divisors (18553).

12513551 is an equidigital number, since it uses as much as digits as its factorization.

12513551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18552.

The product of its digits is 750, while the sum is 23.

The square root of 12513551 is about 3537.4497876295. The cubic root of 12513551 is about 232.1632756207.

The spelling of 12513551 in words is "twelve million, five hundred thirteen thousand, five hundred fifty-one".