75533481 has 9 divisors (see below), whose sum is σ = 109141591. Its totient is φ = 50338272.

The previous prime is 75533461. The next prime is 75533483. The reversal of 75533481 is 18433557.

The square root of 75533481 is 8691.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 8555625 + 66977856 = 2925^2 + 8184^2 .

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 75533481 - 2²¹ = 73436329 is a prime.

It is a super-2 number, since 2×75533481² = 11410613503954722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (75533483) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 24625 + ... + 27521.

Almost surely, 2^75533481 is an apocalyptic number.

75533481 is the 8691-st square number.

75533481 is the 4346-th centered octagonal number.

It is an amenable number.

75533481 is a deficient number, since it is larger than the sum of its proper divisors (33608110).

75533481 is an frugal number, since it uses more digits than its factorization.

75533481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5800 (or 2900 counting only the distinct ones).

The product of its digits is 50400, while the sum is 36.

The cubic root of 75533481 is about 422.7138718547.

Multiplying 75533481 by its sum of digits (36), we get a square (2719205316 = 52146²).

The spelling of 75533481 in words is "seventy-five million, five hundred thirty-three thousand, four hundred eighty-one".