351240401220 has 48 divisors (see below), whose sum is σ = 984841079040. Its totient is φ = 93533825536.

The previous prime is 351240401167. The next prime is 351240401231. The reversal of 351240401220 is 22104042153.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4027797 + ... + 4114076.

It is an arithmetic number, because the mean of its divisors is an integer number (20517522480).

Almost surely, 2^351240401220 is an apocalyptic number.

351240401220 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

351240401220 is an abundant number, since it is smaller than the sum of its proper divisors (633600677820).

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

351240401220 is a wasteful number, since it uses less digits than its factorization.

351240401220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8142604 (or 8142602 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

Adding to 351240401220 its reverse (22104042153), we get a palindrome (373344443373).

The spelling of 351240401220 in words is "three hundred fifty-one billion, two hundred forty million, four hundred one thousand, two hundred twenty".