53139145 has 8 divisors (see below), whose sum is σ = 64042056. Its totient is φ = 42327936.

The previous prime is 53139139. The next prime is 53139167. The reversal of 53139145 is 54193135.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1140624 + 51998521 = 1068^2 + 7211^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 53139145 - 2³ = 53139137 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21642 + ... + 23971.

It is an arithmetic number, because the mean of its divisors is an integer number (8005257).

Almost surely, 2^53139145 is an apocalyptic number.

It is an amenable number.

53139145 is a deficient number, since it is larger than the sum of its proper divisors (10902911).

53139145 is a wasteful number, since it uses less digits than its factorization.

53139145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45851.

The product of its digits is 8100, while the sum is 31.

The square root of 53139145 is about 7289.6601429696. The cubic root of 53139145 is about 375.9570104200.

The spelling of 53139145 in words is "fifty-three million, one hundred thirty-nine thousand, one hundred forty-five".