13455531 has 16 divisors (see below), whose sum is σ = 20474400. Its totient is φ = 8727264.

The previous prime is 13455527. The next prime is 13455539. The reversal of 13455531 is 13555431.

13455531 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13455531 - 2² = 13455527 is a prime.

It is a super-2 number, since 2×13455531² = 362102628983922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 13455495 and 13455504.

It is not an unprimeable number, because it can be changed into a prime (13455539) 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, 5736 + ... + 7733.

It is an arithmetic number, because the mean of its divisors is an integer number (1279650).

Almost surely, 2^13455531 is an apocalyptic number.

13455531 is a deficient number, since it is larger than the sum of its proper divisors (7018869).

13455531 is a wasteful number, since it uses less digits than its factorization.

13455531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13515 (or 13509 counting only the distinct ones).

The product of its digits is 4500, while the sum is 27.

The square root of 13455531 is about 3668.1781581597. The cubic root of 13455531 is about 237.8484252489.

The spelling of 13455531 in words is "thirteen million, four hundred fifty-five thousand, five hundred thirty-one".