2154222711477 has 36 divisors (see below), whose sum is σ = 3231980393356. Its totient is φ = 1435788244800.

The previous prime is 2154222711457. The next prime is 2154222711481. The reversal of 2154222711477 is 7741172224512.

2154222711477 is a `hidden beast` number, since 2 + 1 + 542 + 2 + 27 + 1 + 14 + 77 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 56942367876 + 2097280343601 = 238626^2 + 1448199^2 .

It is not a de Polignac number, because 2154222711477 - 2¹⁸ = 2154222449333 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2154222711457) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 27523683 + ... + 27601839.

Almost surely, 2^{2154222711477} is an apocalyptic number.

2154222711477 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

2154222711477 is a deficient number, since it is larger than the sum of its proper divisors (1077757681879).

2154222711477 is an frugal number, since it uses more digits than its factorization.

2154222711477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82382 (or 82361 counting only the distinct ones).

The product of its digits is 439040, while the sum is 45.

Adding to 2154222711477 its reverse (7741172224512), we get a palindrome (9895394935989).

The spelling of 2154222711477 in words is "two trillion, one hundred fifty-four billion, two hundred twenty-two million, seven hundred eleven thousand, four hundred seventy-seven".