55140750 has 160 divisors (see below), whose sum is σ = 176679360. Its totient is φ = 12571200.

The previous prime is 55140739. The next prime is 55140763. The reversal of 55140750 is 5704155.

55140750 is a `hidden beast` number, since 551 + 40 + 75 + 0 = 666.

It is a super-3 number, since 3×55140750³ (a number of 24 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 141556 + ... + 141944.

It is an arithmetic number, because the mean of its divisors is an integer number (1104246).

Almost surely, 2^55140750 is an apocalyptic number.

55140750 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 55140750, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88339680).

55140750 is an abundant number, since it is smaller than the sum of its proper divisors (121538610).

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

55140750 is a wasteful number, since it uses less digits than its factorization.

55140750 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 425 (or 406 counting only the distinct ones).

The product of its (nonzero) digits is 3500, while the sum is 27.

The square root of 55140750 is about 7425.6817868799. The cubic root of 55140750 is about 380.6193731120.

The spelling of 55140750 in words is "fifty-five million, one hundred forty thousand, seven hundred fifty".