55148780 has 24 divisors (see below), whose sum is σ = 116106480. Its totient is φ = 22003520.

The previous prime is 55148729. The next prime is 55148789. The reversal of 55148780 is 8784155.

It is not an unprimeable number, because it can be changed into a prime (55148789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5090 + ... + 11670.

It is an arithmetic number, because the mean of its divisors is an integer number (4837770).

Almost surely, 2^55148780 is an apocalyptic number.

It is an amenable number.

55148780 is an abundant number, since it is smaller than the sum of its proper divisors (60957700).

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

55148780 is a wasteful number, since it uses less digits than its factorization.

55148780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7009 (or 7007 counting only the distinct ones).

The product of its (nonzero) digits is 44800, while the sum is 38.

The square root of 55148780 is about 7426.2224582893. Note that the first 3 decimals coincide. The cubic root of 55148780 is about 380.6378484091.

It can be divided in two parts, 5 and 5148780, that multiplied together give a triangular number (25743900 = T₇₁₇₅).

The spelling of 55148780 in words is "fifty-five million, one hundred forty-eight thousand, seven hundred eighty".