53115949 has 2 divisors, whose sum is σ = 53115950. Its totient is φ = 53115948.

The previous prime is 53115943. The next prime is 53115961. The reversal of 53115949 is 94951135.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28015849 + 25100100 = 5293^2 + 5010^2 .

It is a cyclic number.

It is not a de Polignac number, because 53115949 - 2³ = 53115941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53115941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26557974 + 26557975.

It is an arithmetic number, because the mean of its divisors is an integer number (26557975).

Almost surely, 2^53115949 is an apocalyptic number.

It is an amenable number.

53115949 is a deficient number, since it is larger than the sum of its proper divisors (1).

53115949 is an equidigital number, since it uses as much as digits as its factorization.

53115949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24300, while the sum is 37.

The square root of 53115949 is about 7288.0689486310. The cubic root of 53115949 is about 375.9022989135.

The spelling of 53115949 in words is "fifty-three million, one hundred fifteen thousand, nine hundred forty-nine".