55172497 has 4 divisors (see below), whose sum is σ = 58417956. Its totient is φ = 51927040.

The previous prime is 55172479. The next prime is 55172519. The reversal of 55172497 is 79427155.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 79427155 = 5 ⋅15885431.

It can be written as a sum of positive squares in 2 ways, for example, as 23464336 + 31708161 = 4844^2 + 5631^2 .

It is a cyclic number.

It is not a de Polignac number, because 55172497 - 2¹¹ = 55170449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55170497) 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, 1622704 + ... + 1622737.

It is an arithmetic number, because the mean of its divisors is an integer number (14604489).

Almost surely, 2^55172497 is an apocalyptic number.

It is an amenable number.

55172497 is a deficient number, since it is larger than the sum of its proper divisors (3245459).

55172497 is a wasteful number, since it uses less digits than its factorization.

55172497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3245458.

The product of its digits is 88200, while the sum is 40.

The square root of 55172497 is about 7427.8191281156. The cubic root of 55172497 is about 380.6924056392.

The spelling of 55172497 in words is "fifty-five million, one hundred seventy-two thousand, four hundred ninety-seven".