55148428 has 6 divisors (see below), whose sum is σ = 96509756. Its totient is φ = 27574212.

The previous prime is 55148413. The next prime is 55148447. The reversal of 55148428 is 82484155.

It is a super-2 number, since 2×55148428² = 6082698221742368, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6893550 + ... + 6893557.

Almost surely, 2^55148428 is an apocalyptic number.

It is an amenable number.

55148428 is a deficient number, since it is larger than the sum of its proper divisors (41361328).

55148428 is a wasteful number, since it uses less digits than its factorization.

55148428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13787111 (or 13787109 counting only the distinct ones).

The product of its digits is 51200, while the sum is 37.

The square root of 55148428 is about 7426.1987584497. The cubic root of 55148428 is about 380.6370385706.

The spelling of 55148428 in words is "fifty-five million, one hundred forty-eight thousand, four hundred twenty-eight".