1555150099 has 2 divisors, whose sum is σ = 1555150100. Its totient is φ = 1555150098.

The previous prime is 1555150097. The next prime is 1555150139. The reversal of 1555150099 is 9900515551.

It is an a-pointer prime, because the next prime (1555150139) can be obtained adding 1555150099 to its sum of digits (40).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1555150099 - 2¹ = 1555150097 is a prime.

Together with 1555150097, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1555150097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 777575049 + 777575050.

It is an arithmetic number, because the mean of its divisors is an integer number (777575050).

Almost surely, 2^1555150099 is an apocalyptic number.

1555150099 is a deficient number, since it is larger than the sum of its proper divisors (1).

1555150099 is an equidigital number, since it uses as much as digits as its factorization.

1555150099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 50625, while the sum is 40.

The square root of 1555150099 is about 39435.3914523490. The cubic root of 1555150099 is about 1158.5748697055.

The spelling of 1555150099 in words is "one billion, five hundred fifty-five million, one hundred fifty thousand, ninety-nine".