55203434553531 has 128 divisors (see below), whose sum is σ = 83968706764800. Its totient is φ = 31965123087360.

The previous prime is 55203434553521. The next prime is 55203434553539. The reversal of 55203434553531 is 13535543430255.

It is not a de Polignac number, because 55203434553531 - 2⁷ = 55203434553403 is a prime.

It is a super-2 number, since 2×55203434553531² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55203434553539) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 27894609700 + ... + 27894611678.

It is an arithmetic number, because the mean of its divisors is an integer number (656005521600).

Almost surely, 2^{55203434553531} is an apocalyptic number.

55203434553531 is a deficient number, since it is larger than the sum of its proper divisors (28765272211269).

55203434553531 is a wasteful number, since it uses less digits than its factorization.

55203434553531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3889.

The product of its (nonzero) digits is 8100000, while the sum is 48.

Adding to 55203434553531 its reverse (13535543430255), we get a palindrome (68738977983786).

The spelling of 55203434553531 in words is "fifty-five trillion, two hundred three billion, four hundred thirty-four million, five hundred fifty-three thousand, five hundred thirty-one".