53149491 has 6 divisors (see below), whose sum is σ = 76771500. Its totient is φ = 35432988.

The previous prime is 53149487. The next prime is 53149493. The reversal of 53149491 is 19494135.

It is a happy number.

It is not a de Polignac number, because 53149491 - 2² = 53149487 is a prime.

It is a super-3 number, since 3×53149491³ (a number of 24 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (53149493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2952741 + ... + 2952758.

It is an arithmetic number, because the mean of its divisors is an integer number (12795250).

Almost surely, 2^53149491 is an apocalyptic number.

53149491 is a deficient number, since it is larger than the sum of its proper divisors (23622009).

53149491 is a wasteful number, since it uses less digits than its factorization.

53149491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5905505 (or 5905502 counting only the distinct ones).

The product of its digits is 19440, while the sum is 36.

The square root of 53149491 is about 7290.3697437098. The cubic root of 53149491 is about 375.9814079950.

The spelling of 53149491 in words is "fifty-three million, one hundred forty-nine thousand, four hundred ninety-one".