151081749 has 108 divisors (see below), whose sum is σ = 292484556. Its totient is φ = 74462976.

The previous prime is 151081729. The next prime is 151081757. The reversal of 151081749 is 947180151.

It can be written as a sum of positive squares in 2 ways, for example, as 51581124 + 99500625 = 7182^2 + 9975^2 .

It is not a de Polignac number, because 151081749 - 2⁷ = 151081621 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (151081729) by changing a digit.

It is a polite number, since it can be written in 107 ways as a sum of consecutive naturals, for example, 2069577 + ... + 2069649.

Almost surely, 2^151081749 is an apocalyptic number.

151081749 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

151081749 is a deficient number, since it is larger than the sum of its proper divisors (141402807).

151081749 is a wasteful number, since it uses less digits than its factorization.

151081749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144 (or 115 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 36.

The square root of 151081749 is about 12291.5315969980. The cubic root of 151081749 is about 532.6034818395.

The spelling of 151081749 in words is "one hundred fifty-one million, eighty-one thousand, seven hundred forty-nine".