55703581 has 4 divisors (see below), whose sum is σ = 55751164. Its totient is φ = 55656000.

The previous prime is 55703579. The next prime is 55703591. The reversal of 55703581 is 18530755.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12538681 + 43164900 = 3541^2 + 6570^2 .

It is a cyclic number.

It is not a de Polignac number, because 55703581 - 2¹ = 55703579 is a prime.

It is a super-2 number, since 2×55703581² = 6205777872447122, 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 (55703551) 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, 21990 + ... + 24391.

It is an arithmetic number, because the mean of its divisors is an integer number (13937791).

Almost surely, 2^55703581 is an apocalyptic number.

It is an amenable number.

55703581 is a deficient number, since it is larger than the sum of its proper divisors (47583).

55703581 is a wasteful number, since it uses less digits than its factorization.

55703581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47582.

The product of its (nonzero) digits is 21000, while the sum is 34.

The square root of 55703581 is about 7463.4831680657. The cubic root of 55703581 is about 381.9100073089.

The spelling of 55703581 in words is "fifty-five million, seven hundred three thousand, five hundred eighty-one".