79220281 has 8 divisors (see below), whose sum is σ = 90596864. Its totient is φ = 67858560.

The previous prime is 79220269. The next prime is 79220311. The reversal of 79220281 is 18202297.

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

It is not a de Polignac number, because 79220281 - 2⁵ = 79220249 is a prime.

It is a super-2 number, since 2×79220281² = 12551705843437922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79220681) 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, 12361 + ... + 17641.

It is an arithmetic number, because the mean of its divisors is an integer number (11324608).

Almost surely, 2^79220281 is an apocalyptic number.

It is an amenable number.

79220281 is a deficient number, since it is larger than the sum of its proper divisors (11376583).

79220281 is a wasteful number, since it uses less digits than its factorization.

79220281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7431.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 79220281 is about 8900.5775655291. The cubic root of 79220281 is about 429.4824872029.

The spelling of 79220281 in words is "seventy-nine million, two hundred twenty thousand, two hundred eighty-one".