157435955021 has 2 divisors, whose sum is σ = 157435955022. Its totient is φ = 157435955020.

The previous prime is 157435954999. The next prime is 157435955023. The reversal of 157435955021 is 120559534751.

157435955021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 144486652996 + 12949302025 = 380114^2 + 113795^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-157435955021 is a prime.

It is a super-2 number, since 2×157435955021² (a number of 23 digits) contains 22 as substring.

Together with 157435955023, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (157435955023) 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 as a sum of consecutive naturals, namely, 78717977510 + 78717977511.

It is an arithmetic number, because the mean of its divisors is an integer number (78717977511).

Almost surely, 2^157435955021 is an apocalyptic number.

It is an amenable number.

157435955021 is a deficient number, since it is larger than the sum of its proper divisors (1).

157435955021 is an equidigital number, since it uses as much as digits as its factorization.

157435955021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 945000, while the sum is 47.

The spelling of 157435955021 in words is "one hundred fifty-seven billion, four hundred thirty-five million, nine hundred fifty-five thousand, twenty-one".