55131455 has 4 divisors (see below), whose sum is σ = 66157752. Its totient is φ = 44105160.

The previous prime is 55131449. The next prime is 55131469. The reversal of 55131455 is 55413155.

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

It is not a de Polignac number, because 55131455 - 2⁸ = 55131199 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5513141 + ... + 5513150.

It is an arithmetic number, because the mean of its divisors is an integer number (16539438).

Almost surely, 2^55131455 is an apocalyptic number.

55131455 is a deficient number, since it is larger than the sum of its proper divisors (11026297).

55131455 is a wasteful number, since it uses less digits than its factorization.

55131455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11026296.

The product of its digits is 7500, while the sum is 29.

The square root of 55131455 is about 7425.0558920455. The cubic root of 55131455 is about 380.5979850830.

The spelling of 55131455 in words is "fifty-five million, one hundred thirty-one thousand, four hundred fifty-five".