77230281 has 4 divisors (see below), whose sum is σ = 102973712. Its totient is φ = 51486852.

The previous prime is 77230273. The next prime is 77230289. The reversal of 77230281 is 18203277.

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 an interprime number because it is at equal distance from previous prime (77230273) and next prime (77230289).

It is not a de Polignac number, because 77230281 - 2³ = 77230273 is a prime.

It is a super-2 number, since 2×77230281² = 11929032606677922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77230289) 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, 12871711 + ... + 12871716.

It is an arithmetic number, because the mean of its divisors is an integer number (25743428).

Almost surely, 2^77230281 is an apocalyptic number.

It is an amenable number.

77230281 is a deficient number, since it is larger than the sum of its proper divisors (25743431).

77230281 is a wasteful number, since it uses less digits than its factorization.

77230281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25743430.

The product of its (nonzero) digits is 4704, while the sum is 30.

The square root of 77230281 is about 8788.0760693112. The cubic root of 77230281 is about 425.8557723308.

The spelling of 77230281 in words is "seventy-seven million, two hundred thirty thousand, two hundred eighty-one".