75222531 has 6 divisors (see below), whose sum is σ = 108654780. Its totient is φ = 50148348.

The previous prime is 75222509. The next prime is 75222557. The reversal of 75222531 is 13522257.

It is not a de Polignac number, because 75222531 - 2⁷ = 75222403 is a prime.

It is a super-2 number, since 2×75222531² = 11316858340091922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 75222495 and 75222504.

It is not an unprimeable number, because it can be changed into a prime (75222571) 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, 4179021 + ... + 4179038.

It is an arithmetic number, because the mean of its divisors is an integer number (18109130).

Almost surely, 2^75222531 is an apocalyptic number.

75222531 is a deficient number, since it is larger than the sum of its proper divisors (33432249).

75222531 is a wasteful number, since it uses less digits than its factorization.

75222531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8358065 (or 8358062 counting only the distinct ones).

The product of its digits is 4200, while the sum is 27.

The square root of 75222531 is about 8673.0923550946. The cubic root of 75222531 is about 422.1330095164.

Adding to 75222531 its reverse (13522257), we get a palindrome (88744788).

The spelling of 75222531 in words is "seventy-five million, two hundred twenty-two thousand, five hundred thirty-one".