345531451 has 4 divisors (see below), whose sum is σ = 352883232. Its totient is φ = 338179672.

The previous prime is 345531449. The next prime is 345531457. The reversal of 345531451 is 154135543.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 154135543 = 19 ⋅8112397.

It is a cyclic number.

It is not a de Polignac number, because 345531451 - 2¹ = 345531449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (345531457) 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 3 ways as a sum of consecutive naturals, for example, 3675820 + ... + 3675913.

It is an arithmetic number, because the mean of its divisors is an integer number (88220808).

Almost surely, 2^345531451 is an apocalyptic number.

345531451 is a deficient number, since it is larger than the sum of its proper divisors (7351781).

345531451 is an equidigital number, since it uses as much as digits as its factorization.

345531451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7351780.

The product of its digits is 18000, while the sum is 31.

The square root of 345531451 is about 18588.4762958130. The cubic root of 345531451 is about 701.7178563041.

Adding to 345531451 its reverse (154135543), we get a palindrome (499666994).

The spelling of 345531451 in words is "three hundred forty-five million, five hundred thirty-one thousand, four hundred fifty-one".