53921731 has 8 divisors (see below), whose sum is σ = 54847584. Its totient is φ = 53000640.

The previous prime is 53921717. The next prime is 53921761. The reversal of 53921731 is 13712935.

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 53921731 - 2¹¹ = 53919683 is a prime.

It is a super-2 number, since 2×53921731² = 5815106148072722, 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 = 53921693 and 53921702.

It is not an unprimeable number, because it can be changed into a prime (53921761) 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, 27231 + ... + 29143.

It is an arithmetic number, because the mean of its divisors is an integer number (6855948).

Almost surely, 2^53921731 is an apocalyptic number.

53921731 is a deficient number, since it is larger than the sum of its proper divisors (925853).

53921731 is a wasteful number, since it uses less digits than its factorization.

53921731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2381.

The product of its digits is 5670, while the sum is 31.

The square root of 53921731 is about 7343.1417663014. The cubic root of 53921731 is about 377.7936104444.

The spelling of 53921731 in words is "fifty-three million, nine hundred twenty-one thousand, seven hundred thirty-one".