351224240 has 40 divisors (see below), whose sum is σ = 817380720. Its totient is φ = 140354816.

The previous prime is 351224221. The next prime is 351224257. The reversal of 351224240 is 42422153.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 148991 + ... + 151329.

It is an arithmetic number, because the mean of its divisors is an integer number (20434518).

Almost surely, 2^351224240 is an apocalyptic number.

It is an amenable number.

351224240 is an abundant number, since it is smaller than the sum of its proper divisors (466156480).

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

351224240 is a wasteful number, since it uses less digits than its factorization.

351224240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4229 (or 4223 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 351224240 is about 18740.9775625499. The cubic root of 351224240 is about 705.5505917999.

Adding to 351224240 its reverse (42422153), we get a palindrome (393646393).

The spelling of 351224240 in words is "three hundred fifty-one million, two hundred twenty-four thousand, two hundred forty".