1550220343 has 4 divisors (see below), whose sum is σ = 1771680400. Its totient is φ = 1328760288.

The previous prime is 1550220323. The next prime is 1550220359. The reversal of 1550220343 is 3430220551.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1550220343 - 2⁵ = 1550220311 is a prime.

It is a super-2 number, since 2×1550220343² = 4806366223702075298, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1550220313) 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, 110730018 + ... + 110730031.

It is an arithmetic number, because the mean of its divisors is an integer number (442920100).

Almost surely, 2^1550220343 is an apocalyptic number.

1550220343 is a deficient number, since it is larger than the sum of its proper divisors (221460057).

1550220343 is an equidigital number, since it uses as much as digits as its factorization.

1550220343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221460056.

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 1550220343 is about 39372.8376295131. The cubic root of 1550220343 is about 1157.3493637502.

Adding to 1550220343 its reverse (3430220551), we get a palindrome (4980440894).

The spelling of 1550220343 in words is "one billion, five hundred fifty million, two hundred twenty thousand, three hundred forty-three".