1013201553 has 64 divisors (see below), whose sum is σ = 1718728704. Its totient is φ = 516672000.

The previous prime is 1013201549. The next prime is 1013201573. The reversal of 1013201553 is 3551023101.

It is not a de Polignac number, because 1013201553 - 2² = 1013201549 is a prime.

It is a super-2 number, since 2×1013201553² = 2053154774003223618, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1013201503) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1465938 + ... + 1466628.

It is an arithmetic number, because the mean of its divisors is an integer number (26855136).

Almost surely, 2^1013201553 is an apocalyptic number.

1013201553 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1013201553 is a deficient number, since it is larger than the sum of its proper divisors (705527151).

1013201553 is a wasteful number, since it uses less digits than its factorization.

1013201553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 886.

The product of its (nonzero) digits is 450, while the sum is 21.

The square root of 1013201553 is about 31830.8270863325. The cubic root of 1013201553 is about 1004.3812938964.

Adding to 1013201553 its reverse (3551023101), we get a palindrome (4564224654).

It can be divided in two parts, 1013 and 201553, that added together give a triangular number (202566 = T₆₃₆).

The spelling of 1013201553 in words is "one billion, thirteen million, two hundred one thousand, five hundred fifty-three".