75100981 has 8 divisors (see below), whose sum is σ = 77818680. Its totient is φ = 72391872.

The previous prime is 75100969. The next prime is 75100999. The reversal of 75100981 is 18900157.

It can be written as a sum of positive squares in 4 ways, for example, as 45778756 + 29322225 = 6766^2 + 5415^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 75100981 - 2⁷ = 75100853 is a prime.

It is a super-2 number, since 2×75100981² = 11280314694324722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75109981) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19491 + ... + 23023.

It is an arithmetic number, because the mean of its divisors is an integer number (9727335).

Almost surely, 2^75100981 is an apocalyptic number.

It is an amenable number.

75100981 is a deficient number, since it is larger than the sum of its proper divisors (2717699).

75100981 is a wasteful number, since it uses less digits than its factorization.

75100981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4295.

The product of its (nonzero) digits is 2520, while the sum is 31.

The square root of 75100981 is about 8666.0822174729. The cubic root of 75100981 is about 421.9055159344.

The spelling of 75100981 in words is "seventy-five million, one hundred thousand, nine hundred eighty-one".