73220351 has 2 divisors, whose sum is σ = 73220352. Its totient is φ = 73220350.

The previous prime is 73220317. The next prime is 73220393. The reversal of 73220351 is 15302237.

It is a weak prime.

It is an emirp because it is prime and its reverse (15302237) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-73220351 is a prime.

It is a super-2 number, since 2×73220351² = 10722439601126402, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73220311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36610175 + 36610176.

It is an arithmetic number, because the mean of its divisors is an integer number (36610176).

Almost surely, 2^73220351 is an apocalyptic number.

73220351 is a deficient number, since it is larger than the sum of its proper divisors (1).

73220351 is an equidigital number, since it uses as much as digits as its factorization.

73220351 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1260, while the sum is 23.

The square root of 73220351 is about 8556.8890959273. The cubic root of 73220351 is about 418.3540093730.

Adding to 73220351 its reverse (15302237), we get a palindrome (88522588).

The spelling of 73220351 in words is "seventy-three million, two hundred twenty thousand, three hundred fifty-one".