55121436744231 has 192 divisors, whose sum is σ = 93951769466880. Its totient is φ = 28384388997120.

The previous prime is 55121436744211. The next prime is 55121436744271. The reversal of 55121436744231 is 13244763412155.

It is not a de Polignac number, because 55121436744231 - 2³⁹ = 54571680930343 is a prime.

It is a super-2 number, since 2×55121436744231² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55121436744211) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 7187561265 + ... + 7187568933.

It is an arithmetic number, because the mean of its divisors is an integer number (489332132640).

Almost surely, 2^{55121436744231} is an apocalyptic number.

55121436744231 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

55121436744231 is a deficient number, since it is larger than the sum of its proper divisors (38830332722649).

55121436744231 is a wasteful number, since it uses less digits than its factorization.

55121436744231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9386 (or 9373 counting only the distinct ones).

The product of its digits is 2419200, while the sum is 48.

The spelling of 55121436744231 in words is "fifty-five trillion, one hundred twenty-one billion, four hundred thirty-six million, seven hundred forty-four thousand, two hundred thirty-one".