251428033476 has 135 divisors (see below), whose sum is σ = 666881310711. Its totient is φ = 82602913536.

The previous prime is 251428033463. The next prime is 251428033477. The reversal of 251428033476 is 674330824152.

The square root of 251428033476 is 501426.

It is a perfect power (a square), and thus also a powerful number.

251428033476 is a `hidden beast` number, since 2 + 5 + 142 + 8 + 0 + 33 + 476 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 186390792900 + 65037240576 = 431730^2 + 255024^2 .

It is not an unprimeable number, because it can be changed into a prime (251428033477) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 803284296 + ... + 803284608.

Almost surely, 2^251428033476 is an apocalyptic number.

251428033476 is the 501426-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 251428033476

251428033476 is an abundant number, since it is smaller than the sum of its proper divisors (415453277235).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

251428033476 is an frugal number, since it uses more digits than its factorization.

251428033476 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 820 (or 407 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 45.

The spelling of 251428033476 in words is "two hundred fifty-one billion, four hundred twenty-eight million, thirty-three thousand, four hundred seventy-six".