2154038657731 has 8 divisors (see below), whose sum is σ = 2174998625280. Its totient is φ = 2133079593672.

The previous prime is 2154038657707. The next prime is 2154038657767. The reversal of 2154038657731 is 1377568304512.

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 2154038657731 - 2¹¹ = 2154038655683 is a prime.

It is a super-2 number, since 2×2154038657731² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2154038657431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5195406 + ... + 5594668.

It is an arithmetic number, because the mean of its divisors is an integer number (271874828160).

Almost surely, 2^{2154038657731} is an apocalyptic number.

2154038657731 is a deficient number, since it is larger than the sum of its proper divisors (20959967549).

2154038657731 is a wasteful number, since it uses less digits than its factorization.

2154038657731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 451745.

The product of its (nonzero) digits is 4233600, while the sum is 52.

The spelling of 2154038657731 in words is "two trillion, one hundred fifty-four billion, thirty-eight million, six hundred fifty-seven thousand, seven hundred thirty-one".