53193640 has 32 divisors (see below), whose sum is σ = 121331880. Its totient is φ = 20984832.

The previous prime is 53193631. The next prime is 53193649. The reversal of 53193640 is 4639135.

53193640 = T₃₄₇ + T₃₄₈ + ... + T₇₁₁.

It is an interprime number because it is at equal distance from previous prime (53193631) and next prime (53193649).

It can be written as a sum of positive squares in 4 ways, for example, as 37527876 + 15665764 = 6126^2 + 3958^2 .

It is not an unprimeable number, because it can be changed into a prime (53193649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6189 + ... + 12028.

Almost surely, 2^53193640 is an apocalyptic number.

It is an amenable number.

53193640 is an abundant number, since it is smaller than the sum of its proper divisors (68138240).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

53193640 is a wasteful number, since it uses less digits than its factorization.

53193640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18301 (or 18297 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 31.

The square root of 53193640 is about 7293.3970137378. The cubic root of 53193640 is about 376.0854830539.

The spelling of 53193640 in words is "fifty-three million, one hundred ninety-three thousand, six hundred forty".