55511532 has 18 divisors (see below), whose sum is σ = 140320908. Its totient is φ = 18503832.

The previous prime is 55511509. The next prime is 55511537. The reversal of 55511532 is 23511555.

It is a tau number, because it is divible by the number of its divisors (18).

It is a junction number, because it is equal to n+sod(n) for n = 55511496 and 55511505.

It is not an unprimeable number, because it can be changed into a prime (55511537) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 770958 + ... + 771029.

It is an arithmetic number, because the mean of its divisors is an integer number (7795606).

Almost surely, 2^55511532 is an apocalyptic number.

It is an amenable number.

55511532 is an abundant number, since it is smaller than the sum of its proper divisors (84809376).

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

55511532 is a wasteful number, since it uses less digits than its factorization.

55511532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1541997 (or 1541992 counting only the distinct ones).

The product of its digits is 3750, while the sum is 27.

The square root of 55511532 is about 7450.6061498377. The cubic root of 55511532 is about 381.4705987681.

The spelling of 55511532 in words is "fifty-five million, five hundred eleven thousand, five hundred thirty-two".