75321481 has 4 divisors (see below), whose sum is σ = 78596352. Its totient is φ = 72046612.

The previous prime is 75321479. The next prime is 75321503. The reversal of 75321481 is 18412357.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 75321481 - 2¹ = 75321479 is a prime.

It is a super-2 number, since 2×75321481² = 11346651000066722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (75321461) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1637401 + ... + 1637446.

It is an arithmetic number, because the mean of its divisors is an integer number (19649088).

Almost surely, 2^75321481 is an apocalyptic number.

It is an amenable number.

75321481 is a deficient number, since it is larger than the sum of its proper divisors (3274871).

75321481 is a wasteful number, since it uses less digits than its factorization.

75321481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3274870.

The product of its digits is 6720, while the sum is 31.

The square root of 75321481 is about 8678.7949048241. The cubic root of 75321481 is about 422.3180239392.

The spelling of 75321481 in words is "seventy-five million, three hundred twenty-one thousand, four hundred eighty-one".