1220025313 has 4 divisors (see below), whose sum is σ = 1313873428. Its totient is φ = 1126177200.

The previous prime is 1220025277. The next prime is 1220025341. The reversal of 1220025313 is 3135200221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3135200221 = 31 ⋅101135491.

It can be written as a sum of positive squares in 2 ways, for example, as 151585344 + 1068439969 = 12312^2 + 32687^2 .

It is a cyclic number.

It is not a de Polignac number, because 1220025313 - 2⁹ = 1220024801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1220025343) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46924038 + ... + 46924063.

It is an arithmetic number, because the mean of its divisors is an integer number (328468357).

Almost surely, 2^1220025313 is an apocalyptic number.

1220025313 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1220025313 is a deficient number, since it is larger than the sum of its proper divisors (93848115).

1220025313 is an equidigital number, since it uses as much as digits as its factorization.

1220025313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93848114.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 1220025313 is about 34928.8607458073. The cubic root of 1220025313 is about 1068.5371201778.

Adding to 1220025313 its reverse (3135200221), we get a palindrome (4355225534).

The spelling of 1220025313 in words is "one billion, two hundred twenty million, twenty-five thousand, three hundred thirteen".