251040029 has 2 divisors, whose sum is σ = 251040030. Its totient is φ = 251040028.

The previous prime is 251040001. The next prime is 251040047. The reversal of 251040029 is 920040152.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 243048100 + 7991929 = 15590^2 + 2827^2 .

It is a cyclic number.

It is not a de Polignac number, because 251040029 - 2¹² = 251035933 is a prime.

It is equal to p_13733150 and since 251040029 and 13733150 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 251039986 and 251040013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (251040059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125520014 + 125520015.

It is an arithmetic number, because the mean of its divisors is an integer number (125520015).

Almost surely, 2^251040029 is an apocalyptic number.

It is an amenable number.

251040029 is a deficient number, since it is larger than the sum of its proper divisors (1).

251040029 is an equidigital number, since it uses as much as digits as its factorization.

251040029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 251040029 is about 15844.2427714296. The cubic root of 251040029 is about 630.8328859755.

The spelling of 251040029 in words is "two hundred fifty-one million, forty thousand, twenty-nine".