55420415 has 8 divisors (see below), whose sum is σ = 66547008. Its totient is φ = 44308000.

The previous prime is 55420381. The next prime is 55420427. The reversal of 55420415 is 51402455.

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

It is not a de Polignac number, because 55420415 - 2¹⁰ = 55419391 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 9290 + ... + 14040.

It is an arithmetic number, because the mean of its divisors is an integer number (8318376).

Almost surely, 2^55420415 is an apocalyptic number.

55420415 is a deficient number, since it is larger than the sum of its proper divisors (11126593).

55420415 is a wasteful number, since it uses less digits than its factorization.

55420415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7089.

The product of its (nonzero) digits is 4000, while the sum is 26.

The square root of 55420415 is about 7444.4889011940. The cubic root of 55420415 is about 381.2617683369.

The spelling of 55420415 in words is "fifty-five million, four hundred twenty thousand, four hundred fifteen".