43554153121 has 4 divisors (see below), whose sum is σ = 45056020500. Its totient is φ = 42052285744.

The previous prime is 43554153077. The next prime is 43554153133. The reversal of 43554153121 is 12135145534.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12135145534 = 2 ⋅6067572767.

It can be written as a sum of positive squares in 2 ways, for example, as 20897882721 + 22656270400 = 144561^2 + 150520^2 .

It is a cyclic number.

It is not a de Polignac number, because 43554153121 - 2¹³ = 43554144929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43554183121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 750933646 + ... + 750933703.

It is an arithmetic number, because the mean of its divisors is an integer number (11264005125).

Almost surely, 2^43554153121 is an apocalyptic number.

It is an amenable number.

43554153121 is a deficient number, since it is larger than the sum of its proper divisors (1501867379).

43554153121 is a wasteful number, since it uses less digits than its factorization.

43554153121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1501867378.

The product of its digits is 36000, while the sum is 34.

Adding to 43554153121 its reverse (12135145534), we get a palindrome (55689298655).

The spelling of 43554153121 in words is "forty-three billion, five hundred fifty-four million, one hundred fifty-three thousand, one hundred twenty-one".