1550228019 has 4 divisors (see below), whose sum is σ = 2066970696. Its totient is φ = 1033485344.

The previous prime is 1550228003. The next prime is 1550228023. The reversal of 1550228019 is 9108220551.

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 1550228019 - 2⁴ = 1550228003 is a prime.

It is a super-2 number, since 2×1550228019² = 4806413821785328722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1550228039) 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, 258371334 + ... + 258371339.

It is an arithmetic number, because the mean of its divisors is an integer number (516742674).

Almost surely, 2^1550228019 is an apocalyptic number.

1550228019 is a deficient number, since it is larger than the sum of its proper divisors (516742677).

1550228019 is an equidigital number, since it uses as much as digits as its factorization.

1550228019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 516742676.

The product of its (nonzero) digits is 7200, while the sum is 33.

The square root of 1550228019 is about 39372.9351077615. The cubic root of 1550228019 is about 1157.3512739730.

The spelling of 1550228019 in words is "one billion, five hundred fifty million, two hundred twenty-eight thousand, nineteen".