55252397 has 8 divisors (see below), whose sum is σ = 59462712. Its totient is φ = 51148800.

The previous prime is 55252391. The next prime is 55252403. The reversal of 55252397 is 79325255.

It is an interprime number because it is at equal distance from previous prime (55252391) and next prime (55252403).

It can be written as a sum of positive squares in 4 ways, for example, as 3613801 + 51638596 = 1901^2 + 7186^2 .

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 55252397 - 2⁴ = 55252381 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55252397.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55252391) 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, 25604 + ... + 27677.

It is an arithmetic number, because the mean of its divisors is an integer number (7432839).

Almost surely, 2^55252397 is an apocalyptic number.

It is an amenable number.

55252397 is a deficient number, since it is larger than the sum of its proper divisors (4210315).

55252397 is a wasteful number, since it uses less digits than its factorization.

55252397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53359.

The product of its digits is 94500, while the sum is 38.

The square root of 55252397 is about 7433.1956115792. The cubic root of 55252397 is about 380.8760880496.

The spelling of 55252397 in words is "fifty-five million, two hundred fifty-two thousand, three hundred ninety-seven".