1351155220 has 12 divisors (see below), whose sum is σ = 2837426004. Its totient is φ = 540462080.

The previous prime is 1351155139. The next prime is 1351155229. The reversal of 1351155220 is 225511531.

It can be written as a sum of positive squares in 2 ways, for example, as 549246096 + 801909124 = 23436^2 + 28318^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1351155229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33778861 + ... + 33778900.

It is an arithmetic number, because the mean of its divisors is an integer number (236452167).

Almost surely, 2^1351155220 is an apocalyptic number.

1351155220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1351155220 is an abundant number, since it is smaller than the sum of its proper divisors (1486270784).

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

1351155220 is a wasteful number, since it uses less digits than its factorization.

1351155220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67557770 (or 67557768 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 25.

The square root of 1351155220 is about 36758.0633330974. The cubic root of 1351155220 is about 1105.5246091109.

Adding to 1351155220 its reverse (225511531), we get a palindrome (1576666751).

The spelling of 1351155220 in words is "one billion, three hundred fifty-one million, one hundred fifty-five thousand, two hundred twenty".