53721870 has 32 divisors (see below), whose sum is σ = 136518048. Its totient is φ = 13483008.

The previous prime is 53721851. The next prime is 53721901. The reversal of 53721870 is 7812735.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52159 + ... + 53178.

It is an arithmetic number, because the mean of its divisors is an integer number (4266189).

Almost surely, 2^53721870 is an apocalyptic number.

53721870 is an abundant number, since it is smaller than the sum of its proper divisors (82796178).

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

53721870 is a wasteful number, since it uses less digits than its factorization.

53721870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105364.

The product of its (nonzero) digits is 11760, while the sum is 33.

The square root of 53721870 is about 7329.5204481603. The cubic root of 53721870 is about 377.3262683177.

The spelling of 53721870 in words is "fifty-three million, seven hundred twenty-one thousand, eight hundred seventy".