1220331451 has 8 divisors (see below), whose sum is σ = 1293385104. Its totient is φ = 1147418880.

The previous prime is 1220331439. The next prime is 1220331491. The reversal of 1220331451 is 1541330221.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1220331451 - 2¹¹ = 1220329403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1220331491) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17185 + ... + 52306.

It is an arithmetic number, because the mean of its divisors is an integer number (161673138).

Almost surely, 2^1220331451 is an apocalyptic number.

1220331451 is a deficient number, since it is larger than the sum of its proper divisors (73053653).

1220331451 is a wasteful number, since it uses less digits than its factorization.

1220331451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70541.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 1220331451 is about 34933.2427781905. The cubic root of 1220331451 is about 1068.6264878481.

Adding to 1220331451 its reverse (1541330221), we get a palindrome (2761661672).

The spelling of 1220331451 in words is "one billion, two hundred twenty million, three hundred thirty-one thousand, four hundred fifty-one".