15454545 has 16 divisors (see below), whose sum is σ = 24960960. Its totient is φ = 8164544.

The previous prime is 15454541. The next prime is 15454553. The reversal of 15454545 is 54545451.

It is a cyclic number.

It is not a de Polignac number, because 15454545 - 2² = 15454541 is a prime.

It is a super-2 number, since 2×15454545² = 477685922314050, which contains 22 as substring.

15454545 is a modest number, since divided by 4545 gives 1545 as remainder.

It is not an unprimeable number, because it can be changed into a prime (15454541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3210 + ... + 6419.

It is an arithmetic number, because the mean of its divisors is an integer number (1560060).

Almost surely, 2^15454545 is an apocalyptic number.

15454545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

15454545 is the 3210-th pentagonal number.

It is an amenable number.

15454545 is a deficient number, since it is larger than the sum of its proper divisors (9506415).

15454545 is a wasteful number, since it uses less digits than its factorization.

15454545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9744.

The product of its digits is 40000, while the sum is 33.

The square root of 15454545 is about 3931.2269077223. The cubic root of 15454545 is about 249.0875806818.

Adding to 15454545 its reverse (54545451), we get a palindrome (69999996).

The spelling of 15454545 in words is "fifteen million, four hundred fifty-four thousand, five hundred forty-five".