157218733 has 8 divisors (see below), whose sum is σ = 181051200. Its totient is φ = 133729440.

The previous prime is 157218727. The next prime is 157218757. The reversal of 157218733 is 337812751.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-157218733 is a prime.

It is a super-2 number, since 2×157218733² = 49435460012250578, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 157218692 and 157218701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157218833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84808 + ... + 86641.

It is an arithmetic number, because the mean of its divisors is an integer number (22631400).

Almost surely, 2^157218733 is an apocalyptic number.

It is an amenable number.

157218733 is a deficient number, since it is larger than the sum of its proper divisors (23832467).

157218733 is a wasteful number, since it uses less digits than its factorization.

157218733 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171587.

The product of its digits is 35280, while the sum is 37.

The square root of 157218733 is about 12538.6894450736. The cubic root of 157218733 is about 539.7194850783.

The spelling of 157218733 in words is "one hundred fifty-seven million, two hundred eighteen thousand, seven hundred thirty-three".