1655431520 has 24 divisors (see below), whose sum is σ = 3910957344. Its totient is φ = 662172544.

The previous prime is 1655431507. The next prime is 1655431523. The reversal of 1655431520 is 251345561.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1655431523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5173064 + ... + 5173383.

It is an arithmetic number, because the mean of its divisors is an integer number (162956556).

Almost surely, 2^1655431520 is an apocalyptic number.

1655431520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1655431520 is an abundant number, since it is smaller than the sum of its proper divisors (2255525824).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1655431520 is a wasteful number, since it uses less digits than its factorization.

1655431520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10346462 (or 10346454 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 32.

The square root of 1655431520 is about 40686.9944822667. The cubic root of 1655431520 is about 1182.9609446940.

The spelling of 1655431520 in words is "one billion, six hundred fifty-five million, four hundred thirty-one thousand, five hundred twenty".