15540423 has 16 divisors (see below), whose sum is σ = 22185600. Its totient is φ = 9646560.

The previous prime is 15540419. The next prime is 15540451. The reversal of 15540423 is 32404551.

15540423 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 15540423 - 2² = 15540419 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 15540393 and 15540402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15540493) 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, 1053 + ... + 5673.

It is an arithmetic number, because the mean of its divisors is an integer number (1386600).

Almost surely, 2^15540423 is an apocalyptic number.

15540423 is a deficient number, since it is larger than the sum of its proper divisors (6645177).

15540423 is a wasteful number, since it uses less digits than its factorization.

15540423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4702.

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 15540423 is about 3942.1343203904. The cubic root of 15540423 is about 249.5481063273.

Adding to 15540423 its reverse (32404551), we get a palindrome (47944974).

The spelling of 15540423 in words is "fifteen million, five hundred forty thousand, four hundred twenty-three".