55142760 has 32 divisors (see below), whose sum is σ = 165428640. Its totient is φ = 14704704.

The previous prime is 55142743. The next prime is 55142761. The reversal of 55142760 is 6724155.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (55142761) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 229642 + ... + 229881.

It is an arithmetic number, because the mean of its divisors is an integer number (5169645).

Almost surely, 2^55142760 is an apocalyptic number.

It is an amenable number.

55142760 is an abundant number, since it is smaller than the sum of its proper divisors (110285880).

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

55142760 is a wasteful number, since it uses less digits than its factorization.

55142760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 459537 (or 459533 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 30.

The square root of 55142760 is about 7425.8171267545. The cubic root of 55142760 is about 380.6239978565.

The spelling of 55142760 in words is "fifty-five million, one hundred forty-two thousand, seven hundred sixty".