151431109 has 2 divisors, whose sum is σ = 151431110. Its totient is φ = 151431108.

The previous prime is 151431107. The next prime is 151431131. The reversal of 151431109 is 901134151.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 115992900 + 35438209 = 10770^2 + 5953^2 .

It is a cyclic number.

It is not a de Polignac number, because 151431109 - 2¹ = 151431107 is a prime.

Together with 151431107, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (151431107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 75715554 + 75715555.

It is an arithmetic number, because the mean of its divisors is an integer number (75715555).

Almost surely, 2^151431109 is an apocalyptic number.

It is an amenable number.

151431109 is a deficient number, since it is larger than the sum of its proper divisors (1).

151431109 is an equidigital number, since it uses as much as digits as its factorization.

151431109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 540, while the sum is 25.

The square root of 151431109 is about 12305.7348013030. The cubic root of 151431109 is about 533.0136948868.

It can be divided in two parts, 1514 and 31109, that added together give a palindrome (32623).

The spelling of 151431109 in words is "one hundred fifty-one million, four hundred thirty-one thousand, one hundred nine".