53921511 has 48 divisors (see below), whose sum is σ = 94802400. Its totient is φ = 30191616.

The previous prime is 53921503. The next prime is 53921513. The reversal of 53921511 is 11512935.

It is not a de Polignac number, because 53921511 - 2³ = 53921503 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53921513) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 69735 + ... + 70503.

It is an arithmetic number, because the mean of its divisors is an integer number (1975050).

Almost surely, 2^53921511 is an apocalyptic number.

53921511 is a deficient number, since it is larger than the sum of its proper divisors (40880889).

53921511 is a wasteful number, since it uses less digits than its factorization.

53921511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 845 (or 832 counting only the distinct ones).

The product of its digits is 1350, while the sum is 27.

The square root of 53921511 is about 7343.1267863220. The cubic root of 53921511 is about 377.7930966459.

It can be divided in two parts, 5392 and 1511, that added together give a triangular number (6903 = T₁₁₇).

The spelling of 53921511 in words is "fifty-three million, nine hundred twenty-one thousand, five hundred eleven".