1220530351 has 8 divisors (see below), whose sum is σ = 1348514784. Its totient is φ = 1098789120.

The previous prime is 1220530349. The next prime is 1220530369. The reversal of 1220530351 is 1530350221.

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

It is not a de Polignac number, because 1220530351 - 2¹ = 1220530349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220530321) 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, 1560390 + ... + 1561171.

It is an arithmetic number, because the mean of its divisors is an integer number (168564348).

Almost surely, 2^1220530351 is an apocalyptic number.

1220530351 is a deficient number, since it is larger than the sum of its proper divisors (127984433).

1220530351 is a wasteful number, since it uses less digits than its factorization.

1220530351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3121601.

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 1220530351 is about 34936.0895207234. The cubic root of 1220530351 is about 1068.6845426390.

Adding to 1220530351 its reverse (1530350221), we get a palindrome (2750880572).

The spelling of 1220530351 in words is "one billion, two hundred twenty million, five hundred thirty thousand, three hundred fifty-one".