78225133 has 4 divisors (see below), whose sum is σ = 89400160. Its totient is φ = 67050108.

The previous prime is 78225131. The next prime is 78225137. The reversal of 78225133 is 33152287.

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, and also an emirpimes, since its reverse is a distinct semiprime: 33152287 = 7 ⋅4736041.

It is a cyclic number.

It is not a de Polignac number, because 78225133 - 2¹ = 78225131 is a prime.

It is a super-2 number, since 2×78225133² = 12238342865735378, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78225095 and 78225104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78225131) 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, 5587503 + ... + 5587516.

It is an arithmetic number, because the mean of its divisors is an integer number (22350040).

Almost surely, 2^78225133 is an apocalyptic number.

It is an amenable number.

78225133 is a deficient number, since it is larger than the sum of its proper divisors (11175027).

78225133 is a wasteful number, since it uses less digits than its factorization.

78225133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11175026.

The product of its digits is 10080, while the sum is 31.

The square root of 78225133 is about 8844.4973288480. The cubic root of 78225133 is about 427.6765487175.

The spelling of 78225133 in words is "seventy-eight million, two hundred twenty-five thousand, one hundred thirty-three".