53121047 has 6 divisors (see below), whose sum is σ = 61793928. Its totient is φ = 45532284.

The previous prime is 53121043. The next prime is 53121049. The reversal of 53121047 is 74012135.

It is not a de Polignac number, because 53121047 - 2² = 53121043 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53121043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 542003 + ... + 542100.

It is an arithmetic number, because the mean of its divisors is an integer number (10298988).

Almost surely, 2^53121047 is an apocalyptic number.

53121047 is a deficient number, since it is larger than the sum of its proper divisors (8672881).

53121047 is a wasteful number, since it uses less digits than its factorization.

53121047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1084117 (or 1084110 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 53121047 is about 7288.4186899491. The cubic root of 53121047 is about 375.9143247341.

The spelling of 53121047 in words is "fifty-three million, one hundred twenty-one thousand, forty-seven".