53212906 has 4 divisors (see below), whose sum is σ = 79819362. Its totient is φ = 26606452.

The previous prime is 53212903. The next prime is 53212909. The reversal of 53212906 is 60921235.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 60921235 = 5 ⋅12184247.

It is an interprime number because it is at equal distance from previous prime (53212903) and next prime (53212909).

It can be written as a sum of positive squares in only one way, i.e., 51969681 + 1243225 = 7209^2 + 1115^2 .

It is a super-2 number, since 2×53212906² = 5663226729929672, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (53212903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13303225 + ... + 13303228.

Almost surely, 2^53212906 is an apocalyptic number.

53212906 is a deficient number, since it is larger than the sum of its proper divisors (26606456).

53212906 is a wasteful number, since it uses less digits than its factorization.

53212906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26606455.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 53212906 is about 7294.7176778817. The cubic root of 53212906 is about 376.1308818919.

The spelling of 53212906 in words is "fifty-three million, two hundred twelve thousand, nine hundred six".