55901000 has 32 divisors (see below), whose sum is σ = 130810680. Its totient is φ = 22360000.

The previous prime is 55900997. The next prime is 55901011. The reversal of 55901000 is 10955.

It can be written as a sum of positive squares in 4 ways, for example, as 31832164 + 24068836 = 5642^2 + 4906^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26951 + ... + 28950.

Almost surely, 2^55901000 is an apocalyptic number.

55901000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

55901000 is an abundant number, since it is smaller than the sum of its proper divisors (74909680).

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

55901000 is a wasteful number, since it uses less digits than its factorization.

55901000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55922 (or 55908 counting only the distinct ones).

The product of its (nonzero) digits is 225, while the sum is 20.

The square root of 55901000 is about 7476.6971317554. The cubic root of 55901000 is about 382.3606509642.

Adding to 55901000 its reverse (10955), we get a palindrome (55911955).

The spelling of 55901000 in words is "fifty-five million, nine hundred one thousand".