345521430 has 64 divisors (see below), whose sum is σ = 975602880. Its totient is φ = 86717952.

The previous prime is 345521411. The next prime is 345521437. The reversal of 345521430 is 34125543.

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 345521394 and 345521403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (345521437) 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 31 ways as a sum of consecutive naturals, for example, 33049 + ... + 42228.

It is an arithmetic number, because the mean of its divisors is an integer number (15243795).

Almost surely, 2^345521430 is an apocalyptic number.

345521430 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

345521430 is an abundant number, since it is smaller than the sum of its proper divisors (630081450).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

345521430 is a wasteful number, since it uses less digits than its factorization.

345521430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75310 (or 75304 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

The square root of 345521430 is about 18588.2067451382. The cubic root of 345521430 is about 701.7110725679.

Adding to 345521430 its reverse (34125543), we get a palindrome (379646973).

The spelling of 345521430 in words is "three hundred forty-five million, five hundred twenty-one thousand, four hundred thirty".