75251990 has 16 divisors (see below), whose sum is σ = 147767760. Its totient is φ = 27364320.

The previous prime is 75251987. The next prime is 75251993. The reversal of 75251990 is 9915257.

It is an interprime number because it is at equal distance from previous prime (75251987) and next prime (75251993).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75251993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 341945 + ... + 342164.

It is an arithmetic number, because the mean of its divisors is an integer number (9235485).

Almost surely, 2^75251990 is an apocalyptic number.

75251990 is a deficient number, since it is larger than the sum of its proper divisors (72515770).

75251990 is a wasteful number, since it uses less digits than its factorization.

75251990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 684127.

The product of its (nonzero) digits is 28350, while the sum is 38.

The square root of 75251990 is about 8674.7904873835. The cubic root of 75251990 is about 422.1881082267.

The spelling of 75251990 in words is "seventy-five million, two hundred fifty-one thousand, nine hundred ninety".