55148240 has 40 divisors (see below), whose sum is σ = 146538240. Its totient is φ = 18907776.

The previous prime is 55148213. The next prime is 55148251. The reversal of 55148240 is 4284155.

It is a tau number, because it is divible by the number of its divisors (40).

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, 48680 + ... + 49799.

It is an arithmetic number, because the mean of its divisors is an integer number (3663456).

Almost surely, 2^55148240 is an apocalyptic number.

It is an amenable number.

55148240 is an abundant number, since it is smaller than the sum of its proper divisors (91390000).

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

55148240 is a wasteful number, since it uses less digits than its factorization.

55148240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98499 (or 98493 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 29.

The square root of 55148240 is about 7426.1861005499. The cubic root of 55148240 is about 380.6366060419.

The spelling of 55148240 in words is "fifty-five million, one hundred forty-eight thousand, two hundred forty".