251428606 has 32 divisors (see below), whose sum is σ = 469149408. Its totient is φ = 99287040.

The previous prime is 251428603. The next prime is 251428607. The reversal of 251428606 is 606824152.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251428601) 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, 20995 + ... + 30718.

It is an arithmetic number, because the mean of its divisors is an integer number (14660919).

Almost surely, 2^251428606 is an apocalyptic number.

251428606 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

251428606 is a deficient number, since it is larger than the sum of its proper divisors (217720802).

251428606 is a wasteful number, since it uses less digits than its factorization.

251428606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51756.

The product of its (nonzero) digits is 23040, while the sum is 34.

The square root of 251428606 is about 15856.5004335761. The cubic root of 251428606 is about 631.1582003421.

The spelling of 251428606 in words is "two hundred fifty-one million, four hundred twenty-eight thousand, six hundred six".