238455641951 has 4 divisors (see below), whose sum is σ = 238966254072. Its totient is φ = 237945029832.

The previous prime is 238455641933. The next prime is 238455641971. The reversal of 238455641951 is 159146554832.

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 238455641951 - 2⁶ = 238455641887 is a prime.

It is a super-2 number, since 2×238455641951² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 238455641893 and 238455641902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (238455641971) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 255305360 + ... + 255306293.

It is an arithmetic number, because the mean of its divisors is an integer number (59741563518).

Almost surely, 2^238455641951 is an apocalyptic number.

238455641951 is a deficient number, since it is larger than the sum of its proper divisors (510612121).

238455641951 is an equidigital number, since it uses as much as digits as its factorization.

238455641951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 510612120.

The product of its digits is 5184000, while the sum is 53.

The spelling of 238455641951 in words is "two hundred thirty-eight billion, four hundred fifty-five million, six hundred forty-one thousand, nine hundred fifty-one".