55253731 has 4 divisors (see below), whose sum is σ = 59504032. Its totient is φ = 51003432.

The previous prime is 55253713. The next prime is 55253741. The reversal of 55253731 is 13735255.

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 55253731 - 2¹⁷ = 55122659 is a prime.

It is a super-2 number, since 2×55253731² = 6105949578840722, 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 = 55253693 and 55253702.

It is not an unprimeable number, because it can be changed into a prime (55253701) 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, 2125131 + ... + 2125156.

It is an arithmetic number, because the mean of its divisors is an integer number (14876008).

Almost surely, 2^55253731 is an apocalyptic number.

55253731 is a deficient number, since it is larger than the sum of its proper divisors (4250301).

55253731 is a wasteful number, since it uses less digits than its factorization.

55253731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4250300.

The product of its digits is 15750, while the sum is 31.

The square root of 55253731 is about 7433.2853436418. The cubic root of 55253731 is about 380.8791532838.

Adding to 55253731 its reverse (13735255), we get a palindrome (68988986).

The spelling of 55253731 in words is "fifty-five million, two hundred fifty-three thousand, seven hundred thirty-one".