13945531 has 2 divisors, whose sum is σ = 13945532. Its totient is φ = 13945530.

The previous prime is 13945493. The next prime is 13945537. The reversal of 13945531 is 13554931.

It is a happy number.

13945531 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13945531 - 2⁷ = 13945403 is a prime.

It is a super-2 number, since 2×13945531² = 388955669743922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 13945493 and 13945502.

It is not a weakly prime, because it can be changed into another prime (13945537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6972765 + 6972766.

It is an arithmetic number, because the mean of its divisors is an integer number (6972766).

Almost surely, 2^13945531 is an apocalyptic number.

13945531 is a deficient number, since it is larger than the sum of its proper divisors (1).

13945531 is an equidigital number, since it uses as much as digits as its factorization.

13945531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8100, while the sum is 31.

The square root of 13945531 is about 3734.3715669440. The cubic root of 13945531 is about 240.7012534177.

The spelling of 13945531 in words is "thirteen million, nine hundred forty-five thousand, five hundred thirty-one".