340312553 has 16 divisors (see below), whose sum is σ = 409960320. Its totient is φ = 275965056.

The previous prime is 340312543. The next prime is 340312559. The reversal of 340312553 is 355213043.

It is a cyclic number.

It is not a de Polignac number, because 340312553 - 2¹⁸ = 340050409 is a prime.

It is not an unprimeable number, because it can be changed into a prime (340312559) 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, 136151 + ... + 138627.

It is an arithmetic number, because the mean of its divisors is an integer number (25622520).

Almost surely, 2^340312553 is an apocalyptic number.

It is an amenable number.

340312553 is a deficient number, since it is larger than the sum of its proper divisors (69647767).

340312553 is a wasteful number, since it uses less digits than its factorization.

340312553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3536.

The product of its (nonzero) digits is 5400, while the sum is 26.

The square root of 340312553 is about 18447.5622508775. The cubic root of 340312553 is about 698.1670091580.

Adding to 340312553 its reverse (355213043), we get a palindrome (695525596).

The spelling of 340312553 in words is "three hundred forty million, three hundred twelve thousand, five hundred fifty-three".