1220051313 has 24 divisors (see below), whose sum is σ = 1997748480. Its totient is φ = 711283680.

The previous prime is 1220051303. The next prime is 1220051317. The reversal of 1220051313 is 3131500221.

It is not a de Polignac number, because 1220051313 - 2⁴ = 1220051297 is a prime.

It is a super-3 number, since 3×1220051313³ (a number of 28 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (1220051317) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 272193 + ... + 276638.

It is an arithmetic number, because the mean of its divisors is an integer number (83239520).

Almost surely, 2^1220051313 is an apocalyptic number.

1220051313 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1220051313 is a deficient number, since it is larger than the sum of its proper divisors (777697167).

1220051313 is a wasteful number, since it uses less digits than its factorization.

1220051313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 548869 (or 548866 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 1220051313 is about 34929.2329288806. The cubic root of 1220051313 is about 1068.5447106673.

Adding to 1220051313 its reverse (3131500221), we get a palindrome (4351551534).

The spelling of 1220051313 in words is "one billion, two hundred twenty million, fifty-one thousand, three hundred thirteen".