73220457 has 4 divisors (see below), whose sum is σ = 97627280. Its totient is φ = 48813636.

The previous prime is 73220429. The next prime is 73220491. The reversal of 73220457 is 75402237.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 73220457 - 2⁶ = 73220393 is a prime.

It is a super-2 number, since 2×73220457² = 10722470646577698, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73220417) 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, 12203407 + ... + 12203412.

It is an arithmetic number, because the mean of its divisors is an integer number (24406820).

Almost surely, 2^73220457 is an apocalyptic number.

It is an amenable number.

73220457 is a deficient number, since it is larger than the sum of its proper divisors (24406823).

73220457 is a wasteful number, since it uses less digits than its factorization.

73220457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24406822.

The product of its (nonzero) digits is 11760, while the sum is 30.

The square root of 73220457 is about 8556.8952897649. The cubic root of 73220457 is about 418.3542112545.

The spelling of 73220457 in words is "seventy-three million, two hundred twenty thousand, four hundred fifty-seven".