1020055553 has 8 divisors (see below), whose sum is σ = 1142863680. Its totient is φ = 902260080.

The previous prime is 1020055549. The next prime is 1020055577. The reversal of 1020055553 is 3555500201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1020055553 - 2² = 1020055549 is a prime.

It is a super-2 number, since 2×1020055553² = 2081026662412271618, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1020055583) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1252733 + ... + 1253546.

It is an arithmetic number, because the mean of its divisors is an integer number (142857960).

Almost surely, 2^1020055553 is an apocalyptic number.

It is an amenable number.

1020055553 is a deficient number, since it is larger than the sum of its proper divisors (122808127).

1020055553 is a wasteful number, since it uses less digits than its factorization.

1020055553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2506327.

The product of its (nonzero) digits is 3750, while the sum is 26.

The square root of 1020055553 is about 31938.3085494520. The cubic root of 1020055553 is about 1006.6409840360.

Adding to 1020055553 its reverse (3555500201), we get a palindrome (4575555754).

The spelling of 1020055553 in words is "one billion, twenty million, fifty-five thousand, five hundred fifty-three".