15213989 has 8 divisors (see below), whose sum is σ = 17414208. Its totient is φ = 13020480.

The previous prime is 15213973. The next prime is 15214013. The reversal of 15213989 is 98931251.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 15213989 - 2⁴ = 15213973 is a prime.

It is a super-2 number, since 2×15213989² = 462930922584242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15213089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4934 + ... + 7400.

It is an arithmetic number, because the mean of its divisors is an integer number (2176776).

Almost surely, 2^15213989 is an apocalyptic number.

It is an amenable number.

15213989 is a deficient number, since it is larger than the sum of its proper divisors (2200219).

15213989 is an equidigital number, since it uses as much as digits as its factorization.

15213989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3355.

The product of its digits is 19440, while the sum is 38.

The square root of 15213989 is about 3900.5113767300. The cubic root of 15213989 is about 247.7884349430.

It can be divided in two parts, 152 and 13989, that added together give a palindrome (14141).

The spelling of 15213989 in words is "fifteen million, two hundred thirteen thousand, nine hundred eighty-nine".