385504251 has 16 divisors (see below), whose sum is σ = 578823168. Its totient is φ = 226101600.

The previous prime is 385504211. The next prime is 385504253. The reversal of 385504251 is 152405583.

It is not a de Polignac number, because 385504251 - 2⁶ = 385504187 is a prime.

It is a super-2 number, since 2×385504251² = 297227055078142002, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (385504253) 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, 187396 + ... + 189441.

It is an arithmetic number, because the mean of its divisors is an integer number (36176448).

Almost surely, 2^385504251 is an apocalyptic number.

385504251 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

385504251 is a deficient number, since it is larger than the sum of its proper divisors (193318917).

385504251 is a wasteful number, since it uses less digits than its factorization.

385504251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 376882.

The product of its (nonzero) digits is 24000, while the sum is 33.

The square root of 385504251 is about 19634.2621710112. The cubic root of 385504251 is about 727.7960996356.

The spelling of 385504251 in words is "three hundred eighty-five million, five hundred four thousand, two hundred fifty-one".