523149381 has 32 divisors (see below), whose sum is σ = 840672000. Its totient is φ = 320232960.

The previous prime is 523149353. The next prime is 523149383. The reversal of 523149381 is 183941325.

523149381 is a `hidden beast` number, since 5 + 231 + 49 + 381 = 666.

It is not a de Polignac number, because 523149381 - 2⁵ = 523149349 is a prime.

It is a super-2 number, since 2×523149381² = 547370549681366322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (523149383) 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, 4920 + ... + 32718.

It is an arithmetic number, because the mean of its divisors is an integer number (26271000).

Almost surely, 2^523149381 is an apocalyptic number.

523149381 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

It is an amenable number.

523149381 is a deficient number, since it is larger than the sum of its proper divisors (317522619).

523149381 is a wasteful number, since it uses less digits than its factorization.

523149381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27866 (or 27860 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 523149381 is about 22872.4590064121. The cubic root of 523149381 is about 805.7653208069.

The spelling of 523149381 in words is "five hundred twenty-three million, one hundred forty-nine thousand, three hundred eighty-one".