249990750051 has 32 divisors (see below), whose sum is σ = 383777625600. Its totient is φ = 141790072320.

The previous prime is 249990750007. The next prime is 249990750071. The reversal of 249990750051 is 150057099942.

It is not a de Polignac number, because 249990750051 - 2¹⁹ = 249990225763 is a prime.

It is a super-2 number, since 2×249990750051² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 249990749976 and 249990750003.

It is not an unprimeable number, because it can be changed into a prime (249990750071) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1972155 + ... + 2095083.

It is an arithmetic number, because the mean of its divisors is an integer number (11993050800).

Almost surely, 2^249990750051 is an apocalyptic number.

249990750051 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

249990750051 is a deficient number, since it is larger than the sum of its proper divisors (133786875549).

249990750051 is a wasteful number, since it uses less digits than its factorization.

249990750051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123659.

The product of its (nonzero) digits is 1020600, while the sum is 51.

The spelling of 249990750051 in words is "two hundred forty-nine billion, nine hundred ninety million, seven hundred fifty thousand, fifty-one".