75072251 has 8 divisors (see below), whose sum is σ = 76403520. Its totient is φ = 73749312.

The previous prime is 75072229. The next prime is 75072269. The reversal of 75072251 is 15227057.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-75072251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (75077251) 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, 17726 + ... + 21548.

It is an arithmetic number, because the mean of its divisors is an integer number (9550440).

Almost surely, 2^75072251 is an apocalyptic number.

75072251 is a deficient number, since it is larger than the sum of its proper divisors (1331269).

75072251 is a wasteful number, since it uses less digits than its factorization.

75072251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4165.

The product of its (nonzero) digits is 4900, while the sum is 29.

The square root of 75072251 is about 8664.4244471286. The cubic root of 75072251 is about 421.8517088632.

The spelling of 75072251 in words is "seventy-five million, seventy-two thousand, two hundred fifty-one".