52153821 has 8 divisors (see below), whose sum is σ = 77264960. Its totient is φ = 34769196.

The previous prime is 52153819. The next prime is 52153823. The reversal of 52153821 is 12835125.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (52153819) and next prime (52153823).

It is not a de Polignac number, because 52153821 - 2¹ = 52153819 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 1931623 = 52153821 / (5 + 2 + 1 + 5 + 3 + 8 + 2 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52153823) 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 in 7 ways as a sum of consecutive naturals, for example, 965785 + ... + 965838.

It is an arithmetic number, because the mean of its divisors is an integer number (9658120).

Almost surely, 2^52153821 is an apocalyptic number.

It is an amenable number.

52153821 is a deficient number, since it is larger than the sum of its proper divisors (25111139).

52153821 is a wasteful number, since it uses less digits than its factorization.

52153821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1931632 (or 1931626 counting only the distinct ones).

The product of its digits is 2400, while the sum is 27.

The square root of 52153821 is about 7221.7602424894. The cubic root of 52153821 is about 373.6187909433.

Adding to 52153821 its reverse (12835125), we get a palindrome (64988946).

The spelling of 52153821 in words is "fifty-two million, one hundred fifty-three thousand, eight hundred twenty-one".