55421506 has 16 divisors (see below), whose sum is σ = 95898816. Its totient is φ = 23529456.

The previous prime is 55421503. The next prime is 55421533. The reversal of 55421506 is 60512455.

It is not an unprimeable number, because it can be changed into a prime (55421503) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17001 + ... + 19996.

It is an arithmetic number, because the mean of its divisors is an integer number (5993676).

Almost surely, 2^55421506 is an apocalyptic number.

55421506 is a deficient number, since it is larger than the sum of its proper divisors (40477310).

55421506 is a wasteful number, since it uses less digits than its factorization.

55421506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37113.

The product of its (nonzero) digits is 6000, while the sum is 28.

The square root of 55421506 is about 7444.5621765152. The cubic root of 55421506 is about 381.2642701458.

The spelling of 55421506 in words is "fifty-five million, four hundred twenty-one thousand, five hundred six".