5555151021 has 12 divisors (see below), whose sum is σ = 8616152832. Its totient is φ = 3174371928.

The previous prime is 5555150981. The next prime is 5555151067. The reversal of 5555151021 is 1201515555.

5555151021 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 5555151021 - 2¹⁸ = 5554888877 is a prime.

It is a super-2 number, since 2×5555151021² = 61719405732234684882, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 5555151021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5555151821) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18894925 + ... + 18895218.

It is an arithmetic number, because the mean of its divisors is an integer number (718012736).

Almost surely, 2^5555151021 is an apocalyptic number.

It is an amenable number.

5555151021 is a deficient number, since it is larger than the sum of its proper divisors (3061001811).

5555151021 is a wasteful number, since it uses less digits than its factorization.

5555151021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37790160 (or 37790153 counting only the distinct ones).

The product of its (nonzero) digits is 6250, while the sum is 30.

The square root of 5555151021 is about 74532.8855002944. The cubic root of 5555151021 is about 1771.0546260497.

Adding to 5555151021 its reverse (1201515555), we get a palindrome (6756666576).

The spelling of 5555151021 in words is "five billion, five hundred fifty-five million, one hundred fifty-one thousand, twenty-one".