201242431405 has 8 divisors (see below), whose sum is σ = 243111663000. Its totient is φ = 159913448256.

The previous prime is 201242431399. The next prime is 201242431519. The reversal of 201242431405 is 504134242102.

It can be written as a sum of positive squares in 4 ways, for example, as 5790905604 + 195451525801 = 76098^2 + 442099^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 201242431405 - 2¹⁹ = 201241907117 is a prime.

It is a super-2 number, since 2×201242431405² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 135061290 + ... + 135062779.

It is an arithmetic number, because the mean of its divisors is an integer number (30388957875).

Almost surely, 2^201242431405 is an apocalyptic number.

It is an amenable number.

201242431405 is a deficient number, since it is larger than the sum of its proper divisors (41869231595).

201242431405 is a wasteful number, since it uses less digits than its factorization.

201242431405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270124223.

The product of its (nonzero) digits is 7680, while the sum is 28.

Adding to 201242431405 its reverse (504134242102), we get a palindrome (705376673507).

The spelling of 201242431405 in words is "two hundred one billion, two hundred forty-two million, four hundred thirty-one thousand, four hundred five".