55555537 has 4 divisors (see below), whose sum is σ = 57057076. Its totient is φ = 54054000.

The previous prime is 55555531. The next prime is 55555543. The reversal of 55555537 is 73555555.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (55555531) and next prime (55555543).

It can be written as a sum of positive squares in 2 ways, for example, as 32216976 + 23338561 = 5676^2 + 4831^2 .

It is a cyclic number.

It is not a de Polignac number, because 55555537 - 2¹¹ = 55553489 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55555537.

It is not an unprimeable number, because it can be changed into a prime (55555531) 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, 750714 + ... + 750787.

It is an arithmetic number, because the mean of its divisors is an integer number (14264269).

Almost surely, 2^55555537 is an apocalyptic number.

It is an amenable number.

55555537 is a deficient number, since it is larger than the sum of its proper divisors (1501539).

55555537 is a wasteful number, since it uses less digits than its factorization.

55555537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1501538.

The product of its digits is 328125, while the sum is 40.

The square root of 55555537 is about 7453.5586802547. The cubic root of 55555537 is about 381.5713717028.

The spelling of 55555537 in words is "fifty-five million, five hundred fifty-five thousand, five hundred thirty-seven".