153661431 has 16 divisors (see below), whose sum is σ = 255437568. Its totient is φ = 79824000.

The previous prime is 153661421. The next prime is 153661433. The reversal of 153661431 is 134166351.

It is not a de Polignac number, because 153661431 - 2⁹ = 153660919 is a prime.

It is a super-2 number, since 2×153661431² = 47223670753935522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (153661433) 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 15 ways as a sum of consecutive naturals, for example, 332370 + ... + 332831.

It is an arithmetic number, because the mean of its divisors is an integer number (15964848).

Almost surely, 2^153661431 is an apocalyptic number.

153661431 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

153661431 is a deficient number, since it is larger than the sum of its proper divisors (101776137).

153661431 is a wasteful number, since it uses less digits than its factorization.

153661431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 665222.

The product of its digits is 6480, while the sum is 30.

The square root of 153661431 is about 12396.0248063643. The cubic root of 153661431 is about 535.6177462713.

The spelling of 153661431 in words is "one hundred fifty-three million, six hundred sixty-one thousand, four hundred thirty-one".