15243405040 has 80 divisors (see below), whose sum is σ = 36436105440. Its totient is φ = 5926487040.

The previous prime is 15243405019. The next prime is 15243405041. The reversal of 15243405040 is 4050434251.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×15243405040² (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 (15243405041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3819366 + ... + 3823354.

It is an arithmetic number, because the mean of its divisors is an integer number (455451318).

Almost surely, 2^15243405040 is an apocalyptic number.

15243405040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15243405040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18218052720).

15243405040 is an abundant number, since it is smaller than the sum of its proper divisors (21192700400).

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

15243405040 is a wasteful number, since it uses less digits than its factorization.

15243405040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5330 (or 5324 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 28.

Adding to 15243405040 its reverse (4050434251), we get a palindrome (19293839291).

The spelling of 15243405040 in words is "fifteen billion, two hundred forty-three million, four hundred five thousand, forty".