53721925 has 6 divisors (see below), whose sum is σ = 66615218. Its totient is φ = 42977520.

The previous prime is 53721923. The next prime is 53721953. The reversal of 53721925 is 52912735.

It can be written as a sum of positive squares in 3 ways, for example, as 708964 + 53012961 = 842^2 + 7281^2 .

It is not a de Polignac number, because 53721925 - 2¹ = 53721923 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53721923) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1074414 + ... + 1074463.

Almost surely, 2^53721925 is an apocalyptic number.

It is an amenable number.

53721925 is a deficient number, since it is larger than the sum of its proper divisors (12893293).

53721925 is a wasteful number, since it uses less digits than its factorization.

53721925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2148887 (or 2148882 counting only the distinct ones).

The product of its digits is 18900, while the sum is 34.

The square root of 53721925 is about 7329.5242001101. The cubic root of 53721925 is about 377.3263970855.

It can be divided in two parts, 5 and 3721925, that multiplied together give a cube (18609625 = 265³).

The spelling of 53721925 in words is "fifty-three million, seven hundred twenty-one thousand, nine hundred twenty-five".