53140778 has 4 divisors (see below), whose sum is σ = 79711170. Its totient is φ = 26570388.

The previous prime is 53140757. The next prime is 53140837. The reversal of 53140778 is 87704135.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 49519369 + 3621409 = 7037^2 + 1903^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13285193 + ... + 13285196.

Almost surely, 2^53140778 is an apocalyptic number.

53140778 is a deficient number, since it is larger than the sum of its proper divisors (26570392).

53140778 is a wasteful number, since it uses less digits than its factorization.

53140778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26570391.

The product of its (nonzero) digits is 23520, while the sum is 35.

The square root of 53140778 is about 7289.7721500744. The cubic root of 53140778 is about 375.9608615139.

The spelling of 53140778 in words is "fifty-three million, one hundred forty thousand, seven hundred seventy-eight".