55140131 has 4 divisors (see below), whose sum is σ = 57537552. Its totient is φ = 52742712.

The previous prime is 55140119. The next prime is 55140133. The reversal of 55140131 is 13104155.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 55140131 - 2⁶ = 55140067 is a prime.

It is a super-2 number, since 2×55140131² = 6080868093394322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55140133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1198676 + ... + 1198721.

It is an arithmetic number, because the mean of its divisors is an integer number (14384388).

Almost surely, 2^55140131 is an apocalyptic number.

55140131 is a deficient number, since it is larger than the sum of its proper divisors (2397421).

55140131 is a wasteful number, since it uses less digits than its factorization.

55140131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2397420.

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 55140131 is about 7425.6401070884. The cubic root of 55140131 is about 380.6179488521.

Adding to 55140131 its reverse (13104155), we get a palindrome (68244286).

The spelling of 55140131 in words is "fifty-five million, one hundred forty thousand, one hundred thirty-one".