1550159997 has 16 divisors (see below), whose sum is σ = 2140392000. Its totient is φ = 996758784.

The previous prime is 1550159993. The next prime is 1550160043. The reversal of 1550159997 is 7999510551.

It is not a de Polignac number, because 1550159997 - 2² = 1550159993 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1550159993) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78954 + ... + 96612.

It is an arithmetic number, because the mean of its divisors is an integer number (133774500).

Almost surely, 2^1550159997 is an apocalyptic number.

It is an amenable number.

1550159997 is a deficient number, since it is larger than the sum of its proper divisors (590232003).

1550159997 is a wasteful number, since it uses less digits than its factorization.

1550159997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18700.

The product of its (nonzero) digits is 637875, while the sum is 51.

The square root of 1550159997 is about 39372.0712815569. The cubic root of 1550159997 is about 1157.3343460332.

The spelling of 1550159997 in words is "one billion, five hundred fifty million, one hundred fifty-nine thousand, nine hundred ninety-seven".