49143251 has 2 divisors, whose sum is σ = 49143252. Its totient is φ = 49143250.

The previous prime is 49143223. The next prime is 49143307. The reversal of 49143251 is 15234194.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-49143251 is a prime.

It is not a weakly prime, because it can be changed into another prime (49143551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24571625 + 24571626.

It is an arithmetic number, because the mean of its divisors is an integer number (24571626).

Almost surely, 2^49143251 is an apocalyptic number.

49143251 is a deficient number, since it is larger than the sum of its proper divisors (1).

49143251 is an equidigital number, since it uses as much as digits as its factorization.

49143251 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4320, while the sum is 29.

The square root of 49143251 is about 7010.2247467538. The cubic root of 49143251 is about 366.2868221587.

It can be divided in two parts, 49143 and 251, that added together give a palindrome (49394).

The spelling of 49143251 in words is "forty-nine million, one hundred forty-three thousand, two hundred fifty-one".