345515550 has 24 divisors (see below), whose sum is σ = 856878936. Its totient is φ = 92137440.

The previous prime is 345515543. The next prime is 345515561. The reversal of 345515550 is 55515543.

345515550 = 113² + 114² + ... + 1012².

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1151569 + ... + 1151868.

It is an arithmetic number, because the mean of its divisors is an integer number (35703289).

Almost surely, 2^345515550 is an apocalyptic number.

345515550 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

345515550 is an abundant number, since it is smaller than the sum of its proper divisors (511363386).

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

345515550 is a wasteful number, since it uses less digits than its factorization.

345515550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2303452 (or 2303447 counting only the distinct ones).

The product of its (nonzero) digits is 37500, while the sum is 33.

The square root of 345515550 is about 18588.0485796654. The cubic root of 345515550 is about 701.7070920289.

The spelling of 345515550 in words is "three hundred forty-five million, five hundred fifteen thousand, five hundred fifty".