54197731 has 4 divisors (see below), whose sum is σ = 61940272. Its totient is φ = 46455192.

The previous prime is 54197719. The next prime is 54197749. The reversal of 54197731 is 13779145.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13779145 = 5 ⋅2755829.

It is not a de Polignac number, because 54197731 - 2⁵ = 54197699 is a prime.

It is a super-2 number, since 2×54197731² = 5874788091096722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (54197701) 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, 3871260 + ... + 3871273.

It is an arithmetic number, because the mean of its divisors is an integer number (15485068).

Almost surely, 2^54197731 is an apocalyptic number.

54197731 is a deficient number, since it is larger than the sum of its proper divisors (7742541).

54197731 is an equidigital number, since it uses as much as digits as its factorization.

54197731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7742540.

The product of its digits is 26460, while the sum is 37.

The square root of 54197731 is about 7361.9108253225. The cubic root of 54197731 is about 378.4370964373.

The spelling of 54197731 in words is "fifty-four million, one hundred ninety-seven thousand, seven hundred thirty-one".