1318249151 has 4 divisors (see below), whose sum is σ = 1348906152. Its totient is φ = 1287592152.

The previous prime is 1318249147. The next prime is 1318249157. The reversal of 1318249151 is 1519428131.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1318249151 - 2² = 1318249147 is a prime.

It is a super-2 number, since 2×1318249151² = 3475561648224441602, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1318249157) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15328436 + ... + 15328521.

It is an arithmetic number, because the mean of its divisors is an integer number (337226538).

Almost surely, 2^1318249151 is an apocalyptic number.

1318249151 is a deficient number, since it is larger than the sum of its proper divisors (30657001).

1318249151 is an equidigital number, since it uses as much as digits as its factorization.

1318249151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30657000.

The product of its digits is 8640, while the sum is 35.

The square root of 1318249151 is about 36307.7009875316. The cubic root of 1318249151 is about 1096.4760924543.

The spelling of 1318249151 in words is "one billion, three hundred eighteen million, two hundred forty-nine thousand, one hundred fifty-one".