53345691 has 12 divisors (see below), whose sum is σ = 88062832. Its totient is φ = 30483216.

The previous prime is 53345641. The next prime is 53345693. The reversal of 53345691 is 19654335.

It is not a de Polignac number, because 53345691 - 2⁶ = 53345627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53345693) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 423316 + ... + 423441.

Almost surely, 2^53345691 is an apocalyptic number.

53345691 is a deficient number, since it is larger than the sum of its proper divisors (34717141).

53345691 is a wasteful number, since it uses less digits than its factorization.

53345691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 846770 (or 846767 counting only the distinct ones).

The product of its digits is 48600, while the sum is 36.

The square root of 53345691 is about 7303.8134559968. The cubic root of 53345691 is about 376.4434818312.

It can be divided in two parts, 5334 and 5691, that added together give a square (11025 = 105²).

The spelling of 53345691 in words is "fifty-three million, three hundred forty-five thousand, six hundred ninety-one".