53527421 has 4 divisors (see below), whose sum is σ = 55254144. Its totient is φ = 51800700.

The previous prime is 53527399. The next prime is 53527433. The reversal of 53527421 is 12472535.

It is a happy number.

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: 12472535 = 5 ⋅2494507.

It is a cyclic number.

It is not a de Polignac number, because 53527421 - 2¹⁰ = 53526397 is a prime.

It is a super-2 number, since 2×53527421² = 5730369597822482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53527451) 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, 863315 + ... + 863376.

It is an arithmetic number, because the mean of its divisors is an integer number (13813536).

Almost surely, 2^53527421 is an apocalyptic number.

It is an amenable number.

53527421 is a deficient number, since it is larger than the sum of its proper divisors (1726723).

53527421 is a wasteful number, since it uses less digits than its factorization.

53527421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1726722.

The product of its digits is 8400, while the sum is 29.

The square root of 53527421 is about 7316.2436400109. The cubic root of 53527421 is about 376.8704674990.

Adding to 53527421 its reverse (12472535), we get a palindrome (65999956).

The spelling of 53527421 in words is "fifty-three million, five hundred twenty-seven thousand, four hundred twenty-one".