1550039081 has 2 divisors, whose sum is σ = 1550039082. Its totient is φ = 1550039080.

The previous prime is 1550039011. The next prime is 1550039087. The reversal of 1550039081 is 1809300551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1173679081 + 376360000 = 34259^2 + 19400^2 .

It is a cyclic number.

It is not a de Polignac number, because 1550039081 - 2²² = 1545844777 is a prime.

It is a super-2 number, since 2×1550039081² = 4805242305254649122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1550039087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 775019540 + 775019541.

It is an arithmetic number, because the mean of its divisors is an integer number (775019541).

Almost surely, 2^1550039081 is an apocalyptic number.

It is an amenable number.

1550039081 is a deficient number, since it is larger than the sum of its proper divisors (1).

1550039081 is an equidigital number, since it uses as much as digits as its factorization.

1550039081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5400, while the sum is 32.

The square root of 1550039081 is about 39370.5356961269. The cubic root of 1550039081 is about 1157.3042536817.

The spelling of 1550039081 in words is "one billion, five hundred fifty million, thirty-nine thousand, eighty-one".