53721415 has 16 divisors (see below), whose sum is σ = 70842240. Its totient is φ = 38783520.

The previous prime is 53721403. The next prime is 53721431. The reversal of 53721415 is 51412735.

It is a happy number.

It is not a de Polignac number, because 53721415 - 2¹³ = 53713223 is a prime.

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, 4132 + ... + 11158.

It is an arithmetic number, because the mean of its divisors is an integer number (4427640).

Almost surely, 2^53721415 is an apocalyptic number.

53721415 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

53721415 is a deficient number, since it is larger than the sum of its proper divisors (17120825).

53721415 is a wasteful number, since it uses less digits than its factorization.

53721415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7182.

The product of its digits is 4200, while the sum is 28.

The square root of 53721415 is about 7329.4894092290. The cubic root of 53721415 is about 377.3252030536.

It can be divided in two parts, 537 and 21415, that added together give a cube (21952 = 28³).

The spelling of 53721415 in words is "fifty-three million, seven hundred twenty-one thousand, four hundred fifteen".