157821463 has 2 divisors, whose sum is σ = 157821464. Its totient is φ = 157821462.

The previous prime is 157821431. The next prime is 157821473. The reversal of 157821463 is 364128751.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 157821463 - 2⁵ = 157821431 is a prime.

It is a super-2 number, since 2×157821463² = 49815228366920738, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (157821473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78910731 + 78910732.

It is an arithmetic number, because the mean of its divisors is an integer number (78910732).

Almost surely, 2^157821463 is an apocalyptic number.

157821463 is a deficient number, since it is larger than the sum of its proper divisors (1).

157821463 is an equidigital number, since it uses as much as digits as its factorization.

157821463 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40320, while the sum is 37.

The square root of 157821463 is about 12562.7012620694. The cubic root of 157821463 is about 540.4083137236.

The spelling of 157821463 in words is "one hundred fifty-seven million, eight hundred twenty-one thousand, four hundred sixty-three".