201438238951 has 4 divisors (see below), whose sum is σ = 201439855552. Its totient is φ = 201436622352.

The previous prime is 201438238931. The next prime is 201438238997. The reversal of 201438238951 is 159832834102.

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

It is a cyclic number.

It is not a de Polignac number, because 201438238951 - 2¹⁹ = 201437714663 is a prime.

It is a super-3 number, since 3×201438238951³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201438238931) 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, 604215 + ... + 876328.

It is an arithmetic number, because the mean of its divisors is an integer number (50359963888).

Almost surely, 2^201438238951 is an apocalyptic number.

201438238951 is a deficient number, since it is larger than the sum of its proper divisors (1616601).

201438238951 is a wasteful number, since it uses less digits than its factorization.

201438238951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1616600.

The product of its (nonzero) digits is 414720, while the sum is 46.

The spelling of 201438238951 in words is "two hundred one billion, four hundred thirty-eight million, two hundred thirty-eight thousand, nine hundred fifty-one".