15231123102 has 64 divisors (see below), whose sum is σ = 34732293120. Its totient is φ = 4414103424.

The previous prime is 15231123101. The next prime is 15231123137. The reversal of 15231123102 is 20132113251.

It is a super-2 number, since 2×15231123102² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15231123101) 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, 226683 + ... + 286089.

It is an arithmetic number, because the mean of its divisors is an integer number (542692080).

Almost surely, 2^15231123102 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15231123102, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17366146560).

15231123102 is an abundant number, since it is smaller than the sum of its proper divisors (19501170018).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

15231123102 is a wasteful number, since it uses less digits than its factorization.

15231123102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59617.

The product of its (nonzero) digits is 360, while the sum is 21.

Adding to 15231123102 its reverse (20132113251), we get a palindrome (35363236353).

The spelling of 15231123102 in words is "fifteen billion, two hundred thirty-one million, one hundred twenty-three thousand, one hundred two".