157156493 has 8 divisors (see below), whose sum is σ = 176604288. Its totient is φ = 138759984.

The previous prime is 157156459. The next prime is 157156499. The reversal of 157156493 is 394651751.

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

It is a cyclic number.

It is not a de Polignac number, because 157156493 - 2¹² = 157152397 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 157156493.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157156499) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 262505 + ... + 263102.

It is an arithmetic number, because the mean of its divisors is an integer number (22075536).

Almost surely, 2^157156493 is an apocalyptic number.

157156493 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

157156493 is a deficient number, since it is larger than the sum of its proper divisors (19447795).

157156493 is a wasteful number, since it uses less digits than its factorization.

157156493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 525643.

The product of its digits is 113400, while the sum is 41.

The square root of 157156493 is about 12536.2072813112. The cubic root of 157156493 is about 539.6482540108.

The spelling of 157156493 in words is "one hundred fifty-seven million, one hundred fifty-six thousand, four hundred ninety-three".