1550542001 has 16 divisors (see below), whose sum is σ = 1664385408. Its totient is φ = 1439328000.

The previous prime is 1550541997. The next prime is 1550542051. The reversal of 1550542001 is 1002450551.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1550542001 - 2² = 1550541997 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1550542051) 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, 484316 + ... + 487506.

It is an arithmetic number, because the mean of its divisors is an integer number (104024088).

Almost surely, 2^1550542001 is an apocalyptic number.

It is an amenable number.

1550542001 is a deficient number, since it is larger than the sum of its proper divisors (113843407).

1550542001 is a wasteful number, since it uses less digits than its factorization.

1550542001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3592.

The product of its (nonzero) digits is 1000, while the sum is 23.

The square root of 1550542001 is about 39376.9221880025. The cubic root of 1550542001 is about 1157.4294050463.

Adding to 1550542001 its reverse (1002450551), we get a palindrome (2552992552).

The spelling of 1550542001 in words is "one billion, five hundred fifty million, five hundred forty-two thousand, one".