55420032 has 32 divisors (see below), whose sum is σ = 147210480. Its totient is φ = 18473216.

The previous prime is 55419929. The next prime is 55420039. The reversal of 55420032 is 23002455.

It is a tau number, because it is divible by the number of its divisors (32).

It is a junction number, because it is equal to n+sod(n) for n = 55419990 and 55420008.

It is not an unprimeable number, because it can be changed into a prime (55420039) 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, 71778 + ... + 72545.

Almost surely, 2^55420032 is an apocalyptic number.

It is an amenable number.

55420032 is an abundant number, since it is smaller than the sum of its proper divisors (91790448).

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

55420032 is a wasteful number, since it uses less digits than its factorization.

55420032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144340 (or 144328 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 21.

The square root of 55420032 is about 7444.4631774225. The cubic root of 55420032 is about 381.2608900589.

Adding to 55420032 its reverse (23002455), we get a palindrome (78422487).

The spelling of 55420032 in words is "fifty-five million, four hundred twenty thousand, thirty-two".