249397087051 has 16 divisors (see below), whose sum is σ = 291679432704. Its totient is φ = 208779165504.

The previous prime is 249397087019. The next prime is 249397087067. The reversal of 249397087051 is 150780793942.

It is a happy number.

It is not a de Polignac number, because 249397087051 - 2⁵ = 249397087019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 249397086983 and 249397087001.

It is not an unprimeable number, because it can be changed into a prime (249397687051) 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, 4201686 + ... + 4260628.

It is an arithmetic number, because the mean of its divisors is an integer number (18229964544).

Almost surely, 2^249397087051 is an apocalyptic number.

249397087051 is a deficient number, since it is larger than the sum of its proper divisors (42282345653).

249397087051 is a wasteful number, since it uses less digits than its factorization.

249397087051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73050.

The product of its (nonzero) digits is 3810240, while the sum is 55.

The spelling of 249397087051 in words is "two hundred forty-nine billion, three hundred ninety-seven million, eighty-seven thousand, fifty-one".