53451813 has 16 divisors (see below), whose sum is σ = 72230400. Its totient is φ = 35157696.

The previous prime is 53451809. The next prime is 53451821. The reversal of 53451813 is 31815435.

It is not a de Polignac number, because 53451813 - 2² = 53451809 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53451833) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87756 + ... + 88362.

It is an arithmetic number, because the mean of its divisors is an integer number (4514400).

Almost surely, 2^53451813 is an apocalyptic number.

It is an amenable number.

53451813 is a deficient number, since it is larger than the sum of its proper divisors (18778587).

53451813 is a wasteful number, since it uses less digits than its factorization.

53451813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 956.

The product of its digits is 7200, while the sum is 30.

The square root of 53451813 is about 7311.0746816046. The cubic root of 53451813 is about 376.6929394923.

The spelling of 53451813 in words is "fifty-three million, four hundred fifty-one thousand, eight hundred thirteen".