55773157 has 16 divisors (see below), whose sum is σ = 62036352. Its totient is φ = 49720320.

The previous prime is 55773083. The next prime is 55773167. The reversal of 55773157 is 75137755.

It is a cyclic number.

It is not a de Polignac number, because 55773157 - 2²³ = 47384549 is a prime.

It is a super-2 number, since 2×55773157² = 6221290083493298, 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 (55773167) 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, 178033 + ... + 178345.

It is an arithmetic number, because the mean of its divisors is an integer number (3877272).

Almost surely, 2^55773157 is an apocalyptic number.

It is an amenable number.

55773157 is a deficient number, since it is larger than the sum of its proper divisors (6263195).

55773157 is a wasteful number, since it uses less digits than its factorization.

55773157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 588.

The product of its digits is 128625, while the sum is 40.

The square root of 55773157 is about 7468.1428079543. The cubic root of 55773157 is about 382.0689481094.

The spelling of 55773157 in words is "fifty-five million, seven hundred seventy-three thousand, one hundred fifty-seven".