1351455220 has 24 divisors (see below), whose sum is σ = 2838844008. Its totient is φ = 540432000.

The previous prime is 1351455197. The next prime is 1351455241. The reversal of 1351455220 is 225541531.

It can be written as a sum of positive squares in 4 ways, for example, as 615635344 + 735819876 = 24812^2 + 27126^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90270 + ... + 104170.

It is an arithmetic number, because the mean of its divisors is an integer number (118285167).

Almost surely, 2^1351455220 is an apocalyptic number.

1351455220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1351455220 is an abundant number, since it is smaller than the sum of its proper divisors (1487388788).

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

1351455220 is a wasteful number, since it uses less digits than its factorization.

1351455220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18771 (or 18769 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 28.

The square root of 1351455220 is about 36762.1438439055. The cubic root of 1351455220 is about 1105.6064237523.

Adding to 1351455220 its reverse (225541531), we get a palindrome (1576996751).

The spelling of 1351455220 in words is "one billion, three hundred fifty-one million, four hundred fifty-five thousand, two hundred twenty".