55602421 has 16 divisors (see below), whose sum is σ = 64831104. Its totient is φ = 46704384.

The previous prime is 55602383. The next prime is 55602433. The reversal of 55602421 is 12420655.

It is not a de Polignac number, because 55602421 - 2¹¹ = 55600373 is a prime.

It is a super-2 number, since 2×55602421² = 6183258442122482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55602451) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 118830 + ... + 119296.

It is an arithmetic number, because the mean of its divisors is an integer number (4051944).

Almost surely, 2^55602421 is an apocalyptic number.

It is an amenable number.

55602421 is a deficient number, since it is larger than the sum of its proper divisors (9228683).

55602421 is a wasteful number, since it uses less digits than its factorization.

55602421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 780.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 55602421 is about 7456.7030918496. The cubic root of 55602421 is about 381.6786791115.

The spelling of 55602421 in words is "fifty-five million, six hundred two thousand, four hundred twenty-one".