55415131 has 4 divisors (see below), whose sum is σ = 55539000. Its totient is φ = 55291264.

The previous prime is 55415099. The next prime is 55415161. The reversal of 55415131 is 13151455.

It is a happy number.

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 55415131 - 2⁵ = 55415099 is a prime.

It is a super-2 number, since 2×55415131² = 6141673487494322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55415096 and 55415105.

It is not an unprimeable number, because it can be changed into a prime (55415161) 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, 61261 + ... + 62158.

It is an arithmetic number, because the mean of its divisors is an integer number (13884750).

Almost surely, 2^55415131 is an apocalyptic number.

55415131 is a deficient number, since it is larger than the sum of its proper divisors (123869).

55415131 is a wasteful number, since it uses less digits than its factorization.

55415131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123868.

The product of its digits is 1500, while the sum is 25.

The square root of 55415131 is about 7444.1339993313. The cubic root of 55415131 is about 381.2496509537.

Adding to 55415131 its reverse (13151455), we get a palindrome (68566586).

The spelling of 55415131 in words is "fifty-five million, four hundred fifteen thousand, one hundred thirty-one".