55621235 has 8 divisors (see below), whose sum is σ = 66799296. Its totient is φ = 44461120.

The previous prime is 55621211. The next prime is 55621259. The reversal of 55621235 is 53212655.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (55621211) and next prime (55621259).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 55621235 - 2⁶ = 55621171 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55621198 and 55621207.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3695 + ... + 11175.

It is an arithmetic number, because the mean of its divisors is an integer number (8349912).

Almost surely, 2^55621235 is an apocalyptic number.

55621235 is a deficient number, since it is larger than the sum of its proper divisors (11178061).

55621235 is a wasteful number, since it uses less digits than its factorization.

55621235 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8973.

The product of its digits is 9000, while the sum is 29.

The square root of 55621235 is about 7457.9645346435. The cubic root of 55621235 is about 381.7217233577.

The spelling of 55621235 in words is "fifty-five million, six hundred twenty-one thousand, two hundred thirty-five".