55214236 has 72 divisors (see below), whose sum is σ = 124530560. Its totient is φ = 20956320.

The previous prime is 55214233. The next prime is 55214239. The reversal of 55214236 is 63241255.

It is an interprime number because it is at equal distance from previous prime (55214233) and next prime (55214239).

It is a super-2 number, since 2×55214236² = 6097223714127392, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55214233) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 145495 + ... + 145873.

Almost surely, 2^55214236 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55214236, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62265280).

55214236 is an abundant number, since it is smaller than the sum of its proper divisors (69316324).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55214236 is a wasteful number, since it uses less digits than its factorization.

55214236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 455 (or 442 counting only the distinct ones).

The product of its digits is 7200, while the sum is 28.

The square root of 55214236 is about 7430.6282372354. The cubic root of 55214236 is about 380.7883816895.

The spelling of 55214236 in words is "fifty-five million, two hundred fourteen thousand, two hundred thirty-six".