100023553 has 6 divisors (see below), whose sum is σ = 116353986. Its totient is φ = 85734432.

The previous prime is 100023533. The next prime is 100023607. The reversal of 100023553 is 355320001.

It can be written as a sum of positive squares in only one way, i.e., 77299264 + 22724289 = 8792^2 + 4767^2 .

It is not a de Polignac number, because 100023553 - 2²⁵ = 66469121 is a prime.

It is a super-2 number, since 2×100023553² = 20009422309487618, 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 100023553.

It is not an unprimeable number, because it can be changed into a prime (100023533) 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, 1020600 + ... + 1020697.

It is an arithmetic number, because the mean of its divisors is an integer number (19392331).

Almost surely, 2^100023553 is an apocalyptic number.

It is an amenable number.

100023553 is a deficient number, since it is larger than the sum of its proper divisors (16330433).

100023553 is an equidigital number, since it uses as much as digits as its factorization.

100023553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2041311 (or 2041304 counting only the distinct ones).

The product of its (nonzero) digits is 450, while the sum is 19.

The square root of 100023553 is about 10001.1775806652. The cubic root of 100023553 is about 464.1953216146.

Adding to 100023553 its reverse (355320001), we get a palindrome (455343554).

It can be divided in two parts, 100023 and 553, that added together give a triangular number (100576 = T₄₄₈).

The spelling of 100023553 in words is "one hundred million, twenty-three thousand, five hundred fifty-three".