53626421 has 4 divisors (see below), whose sum is σ = 53781312. Its totient is φ = 53471532.

The previous prime is 53626403. The next prime is 53626427. The reversal of 53626421 is 12462635.

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: 12462635 = 5 ⋅2492527.

It is a cyclic number.

It is not a de Polignac number, because 53626421 - 2¹⁸ = 53364277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53626427) 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, 76925 + ... + 77618.

It is an arithmetic number, because the mean of its divisors is an integer number (13445328).

Almost surely, 2^53626421 is an apocalyptic number.

It is an amenable number.

53626421 is a deficient number, since it is larger than the sum of its proper divisors (154891).

53626421 is a wasteful number, since it uses less digits than its factorization.

53626421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154890.

The product of its digits is 8640, while the sum is 29.

The square root of 53626421 is about 7323.0062815759. The cubic root of 53626421 is about 377.1026674769.

The spelling of 53626421 in words is "fifty-three million, six hundred twenty-six thousand, four hundred twenty-one".