55138154 has 4 divisors (see below), whose sum is σ = 82707234. Its totient is φ = 27569076.

The previous prime is 55138151. The next prime is 55138159. The reversal of 55138154 is 45183155.

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

It can be written as a sum of positive squares in only one way, i.e., 37540129 + 17598025 = 6127^2 + 4195^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 55138154.

It is not an unprimeable number, because it can be changed into a prime (55138151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13784537 + ... + 13784540.

Almost surely, 2^55138154 is an apocalyptic number.

55138154 is a deficient number, since it is larger than the sum of its proper divisors (27569080).

55138154 is a wasteful number, since it uses less digits than its factorization.

55138154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27569079.

The product of its digits is 12000, while the sum is 32.

The square root of 55138154 is about 7425.5069860583. The cubic root of 55138154 is about 380.6133998926.

The spelling of 55138154 in words is "fifty-five million, one hundred thirty-eight thousand, one hundred fifty-four".