55942557 has 16 divisors (see below), whose sum is σ = 83572032. Its totient is φ = 32987520.

The previous prime is 55942553. The next prime is 55942559. The reversal of 55942557 is 75524955.

It is not a de Polignac number, because 55942557 - 2² = 55942553 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55942553) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21688 + ... + 24129.

It is an arithmetic number, because the mean of its divisors is an integer number (5223252).

Almost surely, 2^55942557 is an apocalyptic number.

It is an amenable number.

55942557 is a deficient number, since it is larger than the sum of its proper divisors (27629475).

55942557 is a wasteful number, since it uses less digits than its factorization.

55942557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45868.

The product of its digits is 315000, while the sum is 42.

The square root of 55942557 is about 7479.4757169203. The cubic root of 55942557 is about 382.4553769124.

The spelling of 55942557 in words is "fifty-five million, nine hundred forty-two thousand, five hundred fifty-seven".