15122530553421 has 8 divisors (see below), whose sum is σ = 20163454917760. Its totient is φ = 10081646612352.

The previous prime is 15122530553393. The next prime is 15122530553423. The reversal of 15122530553421 is 12435503522151.

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

It is not a de Polignac number, because 15122530553421 - 2¹⁰ = 15122530552397 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 15122530553421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15122530553423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9221860 + ... + 10737213.

It is an arithmetic number, because the mean of its divisors is an integer number (2520431864720).

Almost surely, 2^{15122530553421} is an apocalyptic number.

It is an amenable number.

15122530553421 is a deficient number, since it is larger than the sum of its proper divisors (5040924364339).

15122530553421 is a wasteful number, since it uses less digits than its factorization.

15122530553421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20211635.

The product of its (nonzero) digits is 180000, while the sum is 39.

The spelling of 15122530553421 in words is "fifteen trillion, one hundred twenty-two billion, five hundred thirty million, five hundred fifty-three thousand, four hundred twenty-one".