19442531 has 2 divisors, whose sum is σ = 19442532. Its totient is φ = 19442530.

The previous prime is 19442519. The next prime is 19442539. The reversal of 19442531 is 13524491.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19442531 - 2¹⁰ = 19441507 is a prime.

It is a super-2 number, since 2×19442531² = 756024023371922, which contains 22 as substring.

It is a Chen prime.

It is equal to p_1237457 and since 19442531 and 1237457 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 19442494 and 19442503.

It is not a weakly prime, because it can be changed into another prime (19442539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9721265 + 9721266.

It is an arithmetic number, because the mean of its divisors is an integer number (9721266).

Almost surely, 2^19442531 is an apocalyptic number.

19442531 is a deficient number, since it is larger than the sum of its proper divisors (1).

19442531 is an equidigital number, since it uses as much as digits as its factorization.

19442531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4320, while the sum is 29.

The square root of 19442531 is about 4409.3685488968. The cubic root of 19442531 is about 268.8959534593.

The spelling of 19442531 in words is "nineteen million, four hundred forty-two thousand, five hundred thirty-one".