345531000 has 128 divisors (see below), whose sum is σ = 1086696000. Its totient is φ = 91404800.

The previous prime is 345530959. The next prime is 345531007. The reversal of 345531000 is 135543.

It is a super-2 number, since 2×345531000² = 238783343922000000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (345531007) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 446614 + ... + 447386.

Almost surely, 2^345531000 is an apocalyptic number.

345531000 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 345531000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (543348000).

345531000 is an abundant number, since it is smaller than the sum of its proper divisors (741165000).

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

345531000 is a wasteful number, since it uses less digits than its factorization.

345531000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 946 (or 932 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 21.

The square root of 345531000 is about 18588.4641646372. The cubic root of 345531000 is about 701.7175510015.

Adding to 345531000 its reverse (135543), we get a palindrome (345666543).

It can be divided in two parts, 34553 and 1000, that added together give a palindrome (35553).

The spelling of 345531000 in words is "three hundred forty-five million, five hundred thirty-one thousand".