5155654021 has 6 divisors (see below), whose sum is σ = 5997393510. Its totient is φ = 4419131976.

The previous prime is 5155654013. The next prime is 5155654067. The reversal of 5155654021 is 1204565515.

It can be written as a sum of positive squares in only one way, i.e., 3079029121 + 2076624900 = 55489^2 + 45570^2 .

It is not a de Polignac number, because 5155654021 - 2³ = 5155654013 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 (5155664021) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 52608666 + ... + 52608763.

It is an arithmetic number, because the mean of its divisors is an integer number (999565585).

Almost surely, 2^5155654021 is an apocalyptic number.

It is an amenable number.

5155654021 is a deficient number, since it is larger than the sum of its proper divisors (841739489).

5155654021 is a wasteful number, since it uses less digits than its factorization.

5155654021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105217443 (or 105217436 counting only the distinct ones).

The product of its (nonzero) digits is 30000, while the sum is 34.

The square root of 5155654021 is about 71802.8830967114. The cubic root of 5155654021 is about 1727.5392438533.

The spelling of 5155654021 in words is "five billion, one hundred fifty-five million, six hundred fifty-four thousand, twenty-one".