73512251 has 4 divisors (see below), whose sum is σ = 73529400. Its totient is φ = 73495104.

The previous prime is 73512247. The next prime is 73512269. The reversal of 73512251 is 15221537.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 15221537 = 41 ⋅371257.

It is a cyclic number.

It is not a de Polignac number, because 73512251 - 2² = 73512247 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 73512251.

It is not an unprimeable number, because it can be changed into a prime (73512211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4235 + ... + 12843.

It is an arithmetic number, because the mean of its divisors is an integer number (18382350).

Almost surely, 2^73512251 is an apocalyptic number.

73512251 is a deficient number, since it is larger than the sum of its proper divisors (17149).

73512251 is an equidigital number, since it uses as much as digits as its factorization.

73512251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17148.

The product of its digits is 2100, while the sum is 26.

The square root of 73512251 is about 8573.9285628001. The cubic root of 73512251 is about 418.9092084597.

Adding to 73512251 its reverse (15221537), we get a palindrome (88733788).

The spelling of 73512251 in words is "seventy-three million, five hundred twelve thousand, two hundred fifty-one".