53721270 has 96 divisors (see below), whose sum is σ = 145117440. Its totient is φ = 13780800.

The previous prime is 53721263. The next prime is 53721293. The reversal of 53721270 is 7212735.

53721270 is a `hidden beast` number, since 537 + 2 + 127 + 0 = 666.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 355695 + ... + 355845.

It is an arithmetic number, because the mean of its divisors is an integer number (1511640).

Almost surely, 2^53721270 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 53721270, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72558720).

53721270 is an abundant number, since it is smaller than the sum of its proper divisors (91396170).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

53721270 is a wasteful number, since it uses less digits than its factorization.

53721270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290 (or 287 counting only the distinct ones).

The product of its (nonzero) digits is 2940, while the sum is 27.

The square root of 53721270 is about 7329.4795176738. The cubic root of 53721270 is about 377.3248635726.

The spelling of 53721270 in words is "fifty-three million, seven hundred twenty-one thousand, two hundred seventy".