55315143 has 40 divisors (see below), whose sum is σ = 89890416. Its totient is φ = 33696000.

The previous prime is 55315121. The next prime is 55315147. The reversal of 55315143 is 34151355.

It is not a de Polignac number, because 55315143 - 2⁸ = 55314887 is a prime.

It is a super-2 number, since 2×55315143² = 6119530090220898, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55315147) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 137743 + ... + 138143.

Almost surely, 2^55315143 is an apocalyptic number.

55315143 is a deficient number, since it is larger than the sum of its proper divisors (34575273).

55315143 is a wasteful number, since it uses less digits than its factorization.

55315143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 557 (or 548 counting only the distinct ones).

The product of its digits is 4500, while the sum is 27.

The square root of 55315143 is about 7437.4150751454. The cubic root of 55315143 is about 381.0202109683.

Adding to 55315143 its reverse (34151355), we get a palindrome (89466498).

The spelling of 55315143 in words is "fifty-five million, three hundred fifteen thousand, one hundred forty-three".