1550220047 has 4 divisors (see below), whose sum is σ = 1586271720. Its totient is φ = 1514168376.

The previous prime is 1550220031. The next prime is 1550220059. The reversal of 1550220047 is 7400220551.

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 1550220047 - 2⁴ = 1550220031 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1550219998 and 1550220025.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1550220097) 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, 18025772 + ... + 18025857.

It is an arithmetic number, because the mean of its divisors is an integer number (396567930).

Almost surely, 2^1550220047 is an apocalyptic number.

1550220047 is a deficient number, since it is larger than the sum of its proper divisors (36051673).

1550220047 is an equidigital number, since it uses as much as digits as its factorization.

1550220047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36051672.

The product of its (nonzero) digits is 2800, while the sum is 26.

The square root of 1550220047 is about 39372.8338705763. The cubic root of 1550220047 is about 1157.3492900885.

Adding to 1550220047 its reverse (7400220551), we get a palindrome (8950440598).

The spelling of 1550220047 in words is "one billion, five hundred fifty million, two hundred twenty thousand, forty-seven".