155640262 has 4 divisors (see below), whose sum is σ = 233460396. Its totient is φ = 77820130.

The previous prime is 155640259. The next prime is 155640281. The reversal of 155640262 is 262046551.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38910064 + ... + 38910067.

It is an arithmetic number, because the mean of its divisors is an integer number (58365099).

Almost surely, 2^155640262 is an apocalyptic number.

155640262 is a deficient number, since it is larger than the sum of its proper divisors (77820134).

155640262 is an equidigital number, since it uses as much as digits as its factorization.

155640262 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77820133.

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 155640262 is about 12475.5866395132. The cubic root of 155640262 is about 537.9071508208.

The spelling of 155640262 in words is "one hundred fifty-five million, six hundred forty thousand, two hundred sixty-two".