75480031 has 4 divisors (see below), whose sum is σ = 82341864. Its totient is φ = 68618200.

The previous prime is 75480001. The next prime is 75480049. The reversal of 75480031 is 13008457.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 75480031 - 2⁷ = 75479903 is a prime.

It is a super-2 number, since 2×75480031² = 11394470159521922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75480001) 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, 3430900 + ... + 3430921.

It is an arithmetic number, because the mean of its divisors is an integer number (20585466).

Almost surely, 2^75480031 is an apocalyptic number.

75480031 is a deficient number, since it is larger than the sum of its proper divisors (6861833).

75480031 is a wasteful number, since it uses less digits than its factorization.

75480031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6861832.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 75480031 is about 8687.9244356751. The cubic root of 75480031 is about 422.6141395343.

Adding to 75480031 its reverse (13008457), we get a palindrome (88488488).

The spelling of 75480031 in words is "seventy-five million, four hundred eighty thousand, thirty-one".