1545550001 has 2 divisors, whose sum is σ = 1545550002. Its totient is φ = 1545550000.

The previous prime is 1545549961. The next prime is 1545550007. The reversal of 1545550001 is 1000555451.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1035874225 + 509675776 = 32185^2 + 22576^2 .

It is a cyclic number.

It is not a de Polignac number, because 1545550001 - 2¹⁴ = 1545533617 is a prime.

It is a super-2 number, since 2×1545550001² = 4777449611182200002, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1545550007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 772775000 + 772775001.

It is an arithmetic number, because the mean of its divisors is an integer number (772775001).

Almost surely, 2^1545550001 is an apocalyptic number.

It is an amenable number.

1545550001 is a deficient number, since it is larger than the sum of its proper divisors (1).

1545550001 is an equidigital number, since it uses as much as digits as its factorization.

1545550001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2500, while the sum is 26.

The square root of 1545550001 is about 39313.4837047037. The cubic root of 1545550001 is about 1156.1859475168.

It can be divided in two parts, 15455 and 50001, that added together give a palindrome (65456).

The spelling of 1545550001 in words is "one billion, five hundred forty-five million, five hundred fifty thousand, one".