231550077 has 32 divisors (see below), whose sum is σ = 343489536. Its totient is φ = 138724080.

The previous prime is 231550069. The next prime is 231550079. The reversal of 231550077 is 770055132.

It is not a de Polignac number, because 231550077 - 2³ = 231550069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231550079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 410998 + ... + 411560.

It is an arithmetic number, because the mean of its divisors is an integer number (10734048).

Almost surely, 2^231550077 is an apocalyptic number.

It is an amenable number.

231550077 is a deficient number, since it is larger than the sum of its proper divisors (111939459).

231550077 is a wasteful number, since it uses less digits than its factorization.

231550077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 702 (or 680 counting only the distinct ones).

The product of its (nonzero) digits is 7350, while the sum is 30.

The square root of 231550077 is about 15216.7695980454. The cubic root of 231550077 is about 614.0658937157.

The spelling of 231550077 in words is "two hundred thirty-one million, five hundred fifty thousand, seventy-seven".