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157005371 = 721321767
BaseRepresentation
bin10010101101110…
…11011000111011
3101221102200212202
421112323120323
5310143132441
623325100415
73614344415
oct1126733073
9357380782
10157005371
1180697506
12446b770b
13266b26b3
1416bcd9b5
15dbb519b
hex95bb63b

157005371 has 4 divisors (see below), whose sum is σ = 157034352. Its totient is φ = 156976392.

The previous prime is 157005301. The next prime is 157005389. The reversal of 157005371 is 173500751.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 173500751 = 359483289.

It is a cyclic number.

It is not a de Polignac number, because 157005371 - 222 = 152811067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (157005301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3671 + ... + 18096.

It is an arithmetic number, because the mean of its divisors is an integer number (39258588).

Almost surely, 2157005371 is an apocalyptic number.

157005371 is a deficient number, since it is larger than the sum of its proper divisors (28981).

157005371 is an equidigital number, since it uses as much as digits as its factorization.

157005371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28980.

The product of its (nonzero) digits is 3675, while the sum is 29.

The square root of 157005371 is about 12530.1784105415. The cubic root of 157005371 is about 539.4752229208.

The spelling of 157005371 in words is "one hundred fifty-seven million, five thousand, three hundred seventy-one".

Divisors: 1 7213 21767 157005371