251632197002 has 4 divisors (see below), whose sum is σ = 377448295506. Its totient is φ = 125816098500.

The previous prime is 251632196939. The next prime is 251632197007. The reversal of 251632197002 is 200791236152.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 142454159761 + 109178037241 = 377431^2 + 330421^2 .

It is not an unprimeable number, because it can be changed into a prime (251632197007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62908049249 + ... + 62908049252.

Almost surely, 2^251632197002 is an apocalyptic number.

251632197002 is a deficient number, since it is larger than the sum of its proper divisors (125816098504).

251632197002 is a wasteful number, since it uses less digits than its factorization.

251632197002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125816098503.

The product of its (nonzero) digits is 45360, while the sum is 38.

The spelling of 251632197002 in words is "two hundred fifty-one billion, six hundred thirty-two million, one hundred ninety-seven thousand, two".