54433431015551 has 16 divisors (see below), whose sum is σ = 62273285268480. Its totient is φ = 46609513140960.

The previous prime is 54433431015529. The next prime is 54433431015589. The reversal of 54433431015551 is 15551013433445.

It is not a de Polignac number, because 54433431015551 - 2²² = 54433426821247 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 (54433431045551) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26364596 + ... + 28354166.

It is an arithmetic number, because the mean of its divisors is an integer number (3892080329280).

Almost surely, 2^{54433431015551} is an apocalyptic number.

54433431015551 is a deficient number, since it is larger than the sum of its proper divisors (7839854252929).

54433431015551 is a wasteful number, since it uses less digits than its factorization.

54433431015551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1993574.

The product of its (nonzero) digits is 1080000, while the sum is 44.

Adding to 54433431015551 its reverse (15551013433445), we get a palindrome (69984444448996).

The spelling of 54433431015551 in words is "fifty-four trillion, four hundred thirty-three billion, four hundred thirty-one million, fifteen thousand, five hundred fifty-one".