73513500251 has 2 divisors, whose sum is σ = 73513500252. Its totient is φ = 73513500250.

The previous prime is 73513500233. The next prime is 73513500257. The reversal of 73513500251 is 15200531537.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-73513500251 is a prime.

It is not a weakly prime, because it can be changed into another prime (73513500257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36756750125 + 36756750126.

It is an arithmetic number, because the mean of its divisors is an integer number (36756750126).

Almost surely, 2^73513500251 is an apocalyptic number.

73513500251 is a deficient number, since it is larger than the sum of its proper divisors (1).

73513500251 is an equidigital number, since it uses as much as digits as its factorization.

73513500251 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15750, while the sum is 32.

The spelling of 73513500251 in words is "seventy-three billion, five hundred thirteen million, five hundred thousand, two hundred fifty-one".