251033551941 has 32 divisors (see below), whose sum is σ = 353635223040. Its totient is φ = 158204330496.

The previous prime is 251033551913. The next prime is 251033551943. The reversal of 251033551941 is 149155330152.

It is not a de Polignac number, because 251033551941 - 2¹³ = 251033543749 is a prime.

It is a super-2 number, since 2×251033551941² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 251033551941.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251033551943) 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, 539115 + ... + 890343.

It is an arithmetic number, because the mean of its divisors is an integer number (11051100720).

Almost surely, 2^251033551941 is an apocalyptic number.

It is an amenable number.

251033551941 is a deficient number, since it is larger than the sum of its proper divisors (102601671099).

251033551941 is a wasteful number, since it uses less digits than its factorization.

251033551941 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351453.

The product of its (nonzero) digits is 81000, while the sum is 39.

The spelling of 251033551941 in words is "two hundred fifty-one billion, thirty-three million, five hundred fifty-one thousand, nine hundred forty-one".