55154140 has 24 divisors (see below), whose sum is σ = 116055072. Its totient is φ = 22017600.

The previous prime is 55154107. The next prime is 55154167. The reversal of 55154140 is 4145155.

It is a happy number.

It is a super-3 number, since 3×55154140³ (a number of 24 digits) contains 333 as substring.

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, 8665 + ... + 13615.

It is an arithmetic number, because the mean of its divisors is an integer number (4835628).

Almost surely, 2^55154140 is an apocalyptic number.

It is an amenable number.

55154140 is an abundant number, since it is smaller than the sum of its proper divisors (60900932).

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

55154140 is a wasteful number, since it uses less digits than its factorization.

55154140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5517 (or 5515 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 25.

The square root of 55154140 is about 7426.5833328658. The cubic root of 55154140 is about 380.6501796143.

Adding to 55154140 its reverse (4145155), we get a palindrome (59299295).

The spelling of 55154140 in words is "fifty-five million, one hundred fifty-four thousand, one hundred forty".