350021345520 has 320 divisors, whose sum is σ = 1424011714560. Its totient is φ = 68903654400.

The previous prime is 350021345483. The next prime is 350021345591. The reversal of 350021345520 is 25543120053.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 147316 + ... + 849555.

It is an arithmetic number, because the mean of its divisors is an integer number (4450036608).

Almost surely, 2^350021345520 is an apocalyptic number.

350021345520 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 350021345520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (712005857280).

350021345520 is an abundant number, since it is smaller than the sum of its proper divisors (1073990369040).

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

350021345520 is a wasteful number, since it uses less digits than its factorization.

350021345520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 996924 (or 996918 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 30.

Adding to 350021345520 its reverse (25543120053), we get a palindrome (375564465573).

The spelling of 350021345520 in words is "three hundred fifty billion, twenty-one million, three hundred forty-five thousand, five hundred twenty".