4251001133161 has 4 divisors (see below), whose sum is σ = 4251025479892. Its totient is φ = 4250976786432.

The previous prime is 4251001133143. The next prime is 4251001133173. The reversal of 4251001133161 is 1613311001524.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2710781138025 + 1540219995136 = 1646445^2 + 1241056^2 .

It is a cyclic number.

It is not a de Polignac number, because 4251001133161 - 2⁷ = 4251001133033 is a prime.

It is a super-2 number, since 2×4251001133161² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4251001133131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11909556 + ... + 12261301.

It is an arithmetic number, because the mean of its divisors is an integer number (1062756369973).

Almost surely, 2^{4251001133161} is an apocalyptic number.

It is an amenable number.

4251001133161 is a deficient number, since it is larger than the sum of its proper divisors (24346731).

4251001133161 is a wasteful number, since it uses less digits than its factorization.

4251001133161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24346730.

The product of its (nonzero) digits is 2160, while the sum is 28.

Adding to 4251001133161 its reverse (1613311001524), we get a palindrome (5864312134685).

The spelling of 4251001133161 in words is "four trillion, two hundred fifty-one billion, one million, one hundred thirty-three thousand, one hundred sixty-one".