345730531 has 4 divisors (see below), whose sum is σ = 346196592. Its totient is φ = 345264472.

The previous prime is 345730481. The next prime is 345730577. The reversal of 345730531 is 135037543.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 135037543 = 29 ⋅4656467.

It is a cyclic number.

It is not a de Polignac number, because 345730531 - 2¹⁵ = 345697763 is a prime.

It is a super-2 number, since 2×345730531² = 239059200131083922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 345730493 and 345730502.

It is not an unprimeable number, because it can be changed into a prime (345731531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 231916 + ... + 233401.

It is an arithmetic number, because the mean of its divisors is an integer number (86549148).

Almost surely, 2^345730531 is an apocalyptic number.

345730531 is a deficient number, since it is larger than the sum of its proper divisors (466061).

345730531 is an equidigital number, since it uses as much as digits as its factorization.

345730531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 466060.

The product of its (nonzero) digits is 18900, while the sum is 31.

The square root of 345730531 is about 18593.8304552881. The cubic root of 345730531 is about 701.8525967353.

The spelling of 345730531 in words is "three hundred forty-five million, seven hundred thirty thousand, five hundred thirty-one".