55131501 has 8 divisors (see below), whose sum is σ = 74895840. Its totient is φ = 36060752.

The previous prime is 55131497. The next prime is 55131509. The reversal of 55131501 is 10513155.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55131501 - 2² = 55131497 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55131509) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 173211 + ... + 173528.

It is an arithmetic number, because the mean of its divisors is an integer number (9361980).

Almost surely, 2^55131501 is an apocalyptic number.

It is an amenable number.

55131501 is a deficient number, since it is larger than the sum of its proper divisors (19764339).

55131501 is a wasteful number, since it uses less digits than its factorization.

55131501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346795.

The product of its (nonzero) digits is 375, while the sum is 21.

The square root of 55131501 is about 7425.0589896647. The cubic root of 55131501 is about 380.5980909361.

Adding to 55131501 its reverse (10513155), we get a palindrome (65644656).

The spelling of 55131501 in words is "fifty-five million, one hundred thirty-one thousand, five hundred one".