1655423431 has 8 divisors (see below), whose sum is σ = 1759806000. Its totient is φ = 1552766400.

The previous prime is 1655423411. The next prime is 1655423449. The reversal of 1655423431 is 1343245561.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1655423431 is a prime.

It is a super-2 number, since 2×1655423431² = 5480853471807623522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1655423411) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 429406 + ... + 433243.

It is an arithmetic number, because the mean of its divisors is an integer number (219975750).

Almost surely, 2^1655423431 is an apocalyptic number.

1655423431 is a deficient number, since it is larger than the sum of its proper divisors (104382569).

1655423431 is a wasteful number, since it uses less digits than its factorization.

1655423431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 862769.

The product of its digits is 43200, while the sum is 34.

The square root of 1655423431 is about 40686.8950769164. The cubic root of 1655423431 is about 1182.9590179081.

Adding to 1655423431 its reverse (1343245561), we get a palindrome (2998668992).

The spelling of 1655423431 in words is "one billion, six hundred fifty-five million, four hundred twenty-three thousand, four hundred thirty-one".