75481951 has 2 divisors, whose sum is σ = 75481952. Its totient is φ = 75481950.

The previous prime is 75481933. The next prime is 75481963. The reversal of 75481951 is 15918457.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (15918457) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 75481951 - 2⁷ = 75481823 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75482951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37740975 + 37740976.

It is an arithmetic number, because the mean of its divisors is an integer number (37740976).

Almost surely, 2^75481951 is an apocalyptic number.

75481951 is a deficient number, since it is larger than the sum of its proper divisors (1).

75481951 is an equidigital number, since it uses as much as digits as its factorization.

75481951 is an evil number, because the sum of its binary digits is even.

The product of its digits is 50400, while the sum is 40.

The square root of 75481951 is about 8688.0349331710. The cubic root of 75481951 is about 422.6177228762.

The spelling of 75481951 in words is "seventy-five million, four hundred eighty-one thousand, nine hundred fifty-one".