231428151 has 32 divisors (see below), whose sum is σ = 362112000. Its totient is φ = 145675584.

The previous prime is 231428143. The next prime is 231428161. The reversal of 231428151 is 151824132.

231428151 is a `hidden beast` number, since 231 + 428 + 1 + 5 + 1 = 666.

It is not a de Polignac number, because 231428151 - 2³ = 231428143 is a prime.

It is a super-3 number, since 3×231428151³ (a number of 26 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231428161) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 209266 + ... + 210368.

It is an arithmetic number, because the mean of its divisors is an integer number (11316000).

Almost surely, 2^231428151 is an apocalyptic number.

231428151 is a deficient number, since it is larger than the sum of its proper divisors (130683849).

231428151 is a wasteful number, since it uses less digits than its factorization.

231428151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1540 (or 1534 counting only the distinct ones).

The product of its digits is 1920, while the sum is 27.

The square root of 231428151 is about 15212.7627668350. The cubic root of 231428151 is about 613.9580930701.

The spelling of 231428151 in words is "two hundred thirty-one million, four hundred twenty-eight thousand, one hundred fifty-one".