15202135421 has 8 divisors (see below), whose sum is σ = 16592671488. Its totient is φ = 13813020000.

The previous prime is 15202135411. The next prime is 15202135423. The reversal of 15202135421 is 12453120251.

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 15202135421 - 2⁶ = 15202135357 is a prime.

It is a super-2 number, since 2×15202135421² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15202135423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 332720 + ... + 375641.

It is an arithmetic number, because the mean of its divisors is an integer number (2074083936).

Almost surely, 2^15202135421 is an apocalyptic number.

15202135421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

15202135421 is a deficient number, since it is larger than the sum of its proper divisors (1390536067).

15202135421 is a wasteful number, since it uses less digits than its factorization.

15202135421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 710323.

The product of its (nonzero) digits is 2400, while the sum is 26.

Adding to 15202135421 its reverse (12453120251), we get a palindrome (27655255672).

The spelling of 15202135421 in words is "fifteen billion, two hundred two million, one hundred thirty-five thousand, four hundred twenty-one".