157953981 has 16 divisors (see below), whose sum is σ = 222508800. Its totient is φ = 99505728.

The previous prime is 157953947. The next prime is 157953989. The reversal of 157953981 is 189359751.

It is not a de Polignac number, because 157953981 - 2¹³ = 157945789 is a prime.

It is a super-2 number, since 2×157953981² = 49898920227496722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 157953981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157953989) 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 15 ways as a sum of consecutive naturals, for example, 15226 + ... + 23403.

It is an arithmetic number, because the mean of its divisors is an integer number (13906800).

Almost surely, 2^157953981 is an apocalyptic number.

It is an amenable number.

157953981 is a deficient number, since it is larger than the sum of its proper divisors (64554819).

157953981 is a wasteful number, since it uses less digits than its factorization.

157953981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38708.

The product of its digits is 340200, while the sum is 48.

The square root of 157953981 is about 12567.9744191337. The cubic root of 157953981 is about 540.5595263510.

The spelling of 157953981 in words is "one hundred fifty-seven million, nine hundred fifty-three thousand, nine hundred eighty-one".