53661541 has 4 divisors (see below), whose sum is σ = 53875584. Its totient is φ = 53447500.

The previous prime is 53661539. The next prime is 53661547. The reversal of 53661541 is 14516635.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 53661541 - 2¹ = 53661539 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53661547) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106645 + ... + 107146.

It is an arithmetic number, because the mean of its divisors is an integer number (13468896).

Almost surely, 2^53661541 is an apocalyptic number.

It is an amenable number.

53661541 is a deficient number, since it is larger than the sum of its proper divisors (214043).

53661541 is a wasteful number, since it uses less digits than its factorization.

53661541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214042.

The product of its digits is 10800, while the sum is 31.

The square root of 53661541 is about 7325.4038113950. The cubic root of 53661541 is about 377.1849711583.

The spelling of 53661541 in words is "fifty-three million, six hundred sixty-one thousand, five hundred forty-one".