40157961 has 16 divisors (see below), whose sum is σ = 56850624. Its totient is φ = 25127424.

The previous prime is 40157959. The next prime is 40157969. The reversal of 40157961 is 16975104.

It is not a de Polignac number, because 40157961 - 2¹ = 40157959 is a prime.

It is a super-2 number, since 2×40157961² = 3225323663355042, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40157969) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22446 + ... + 24168.

It is an arithmetic number, because the mean of its divisors is an integer number (3553164).

Almost surely, 2^40157961 is an apocalyptic number.

It is an amenable number.

40157961 is a deficient number, since it is larger than the sum of its proper divisors (16692663).

40157961 is a wasteful number, since it uses less digits than its factorization.

40157961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2200.

The product of its (nonzero) digits is 7560, while the sum is 33.

The square root of 40157961 is about 6337.0309293864. The cubic root of 40157961 is about 342.4447805555. Note that the first 3 decimals are identical.

The spelling of 40157961 in words is "forty million, one hundred fifty-seven thousand, nine hundred sixty-one".