53815449 has 4 divisors (see below), whose sum is σ = 71753936. Its totient is φ = 35876964.

The previous prime is 53815439. The next prime is 53815471. The reversal of 53815449 is 94451835.

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 not a de Polignac number, because 53815449 - 2⁵ = 53815417 is a prime.

It is a super-2 number, since 2×53815449² = 5792205102143202, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53815439) 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, 8969239 + ... + 8969244.

It is an arithmetic number, because the mean of its divisors is an integer number (17938484).

Almost surely, 2^53815449 is an apocalyptic number.

It is an amenable number.

53815449 is a deficient number, since it is larger than the sum of its proper divisors (17938487).

53815449 is a wasteful number, since it uses less digits than its factorization.

53815449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17938486.

The product of its digits is 86400, while the sum is 39.

The square root of 53815449 is about 7335.9013761091. The cubic root of 53815449 is about 377.5452314850.

It can be divided in two parts, 538154 and 49, that added together give a triangular number (538203 = T₁₀₃₇).

The spelling of 53815449 in words is "fifty-three million, eight hundred fifteen thousand, four hundred forty-nine".