153400561 has 4 divisors (see below), whose sum is σ = 153428452. Its totient is φ = 153372672.

The previous prime is 153400549. The next prime is 153400579. The reversal of 153400561 is 165004351.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 165004351 = 31 ⋅5322721.

It can be written as a sum of positive squares in 2 ways, for example, as 61528336 + 91872225 = 7844^2 + 9585^2 .

It is a cyclic number.

It is not a de Polignac number, because 153400561 - 2⁵ = 153400529 is a prime.

It is a super-2 number, since 2×153400561² = 47063464230229442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (153400591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2640 + ... + 17713.

It is an arithmetic number, because the mean of its divisors is an integer number (38357113).

Almost surely, 2^153400561 is an apocalyptic number.

It is an amenable number.

153400561 is a deficient number, since it is larger than the sum of its proper divisors (27891).

153400561 is an equidigital number, since it uses as much as digits as its factorization.

153400561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27890.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 153400561 is about 12385.4980117878. The cubic root of 153400561 is about 535.3144696754.

The spelling of 153400561 in words is "one hundred fifty-three million, four hundred thousand, five hundred sixty-one".